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w e bchip? series material PSM2001ACD w e bchip? module datasheet august 2001
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 claims this technical docum entation is provided ?as is?. no w a rranty . p&s datacom corp. does not warrant that it is accurate, com p lete or error free. any use of this technical docum entation is at the risk of the user . p&s datacom corp. reserves the right to m a ke changes without prior notice. mcunet? 1.0 protocol and mcuap? 1.0 protocol described in this docum entation m a y only be used in accordance with the term s of related license agreem ent. copy right copyright ?
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 t a ble of contents 1 i n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 fea t ures ............................................................................................................... 4 3 typical applica t ions .................................................................................... 5 4 block di agram ................................................................................................. 5 5 pin configura tio n and descriptio ns .................................................. 7 5 . 1 p in c onfigura t ion .......................................................................................... 7 5 . 2 p in d e s cript ions .............................................................................................. 8 6 recommended o p era t ing conditions ................................................ 9 7 applica t ion notes .......................................................................................... 9 7 . 1 PSM2001ACD an d u ser mcu i nter f a c e m ethod ...................................... 9 7 . 2 PSM2001ACD an d u ser mcu i nter f a c e t im i n g ...................................... 10 7 . 3 PSM2001ACD and s er ver g a tew a y i nter f a c e m ethod and c onfigura t ion ............................................................................................................ 13 7.3.1 rs-232 mode ............................................................................................. 13 7.3.2 rs-485 mode ............................................................................................. 13 7.3.3 s t andar d modem mode ............................................................................. 14 7 . 4 id n umbe r in w eb c hip tm p ro du ct s ........................................................... 15 8 troubleshooting ......................................................................................... 16 9 dimensi o ns ......................................................................................................... 17 p&s d a ta com co rpo r a t ion page 3 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 1 introduction the PSM2001ACD is one m e m b er of the w e bchip tm fam ily of products. the m odule contains a network com m unication controller ps2000, an rs-232 transceiver , an rs-485 transceiver , and a standard modem interface. the PSM2001ACD provides a convenient interface for users to develop various networking applications for intelligent devices. it uses a standard serial peripheral interface (spi) com m unication port to connect to the user mcu and conform s to the mcunet tm protocol. the PSM2001ACD connects to a server gateway w e bchipserver tm through any of the following: rs-232, rs-485 or standard modem . 2 features x single +5v power supply x each m odule has a unique id x supports m u ltiple com m unication m odes
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 3 t y pical applications x intelligent networking consum er products x building control system s x security system s x utility managem e nt system s x rem o tely monitored industrial control equipm ents x com puter peripherals x rem o te medical monitoring system s x t r ansportation and autom o tive system s x com m unication products 4 block diagram the PSM2001ACD m odule block diagram is shown in the figure 1. it consists of the following functional circuits. x ps2000 network com m unication controller x interface circuits
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 cl ock o s cil l at ion cir c u i t ps2 000 r s -2 32 i n t e rf ac e ci r c ui t g r een le d rs-485 inter f ace ci r c ui t /c s,do ,d i, clk , / i n t re set rsi rso 1 t x d, r x d, dc d, dt r rso 2 a&b fi gur e 1 PSM2001ACD bl ock di agram p&s d a ta com co rpo r a t ion page 6 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 5 pin configuration and descriptions 5.1 pin configuration PSM2001ACD pin configuration is shown in figure 2. 11 1 gn d vc c re set /i nt do cl k di /c s rsi rso 1 rs o2 12 18 rx d txd dc d dt r a b nc fi gur e 2 PSM2001ACD pi n confi g urati o n p&s d a ta com co rpo r a t ion page 7 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 5.2 pin descriptions the pin descriptions of PSM2001ACD are shown in the t a ble 1. t a ble 1 pin descriptions name pin i/o/p note 1 description g n d 1 p g r o u n d v c c 2 p p o w e r supply res e t 3 i high activ e reset input. t o r e set the module reliably , the high level of the pin must be held over 50 n ote 1: o= output i/o= input / output i= input p = power s u ppl y n ote 2: rso1 pin must be connected t o the rsi pin directl y when rs-232 communica tion mode or st andard m odem communica tion mode is used . t he rso2 pin must be connected t o the rsi pin directl y when rs-485 communica tion mode is used . p&s d a ta com co rpo r a t ion page 8 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 6 recommended operating conditions the recom m e nded operating conditions of the PSM2001ACD are shown in t a ble 2. t a ble 2 recommended operating conditions m i n n o m m a x unit operating am bient tem p erature 0 + 7 0 c o supply voltage 4 . 7 5 5 5 . 2 5 v high lev e l oper a ting voltage, ( /int , do, di, clk, /cs, rsi, rso1, rso2 ) 2 v low lev e l oper a ting vo ltag e , ( i n t , do, di, clk, cs, rsi, rs o1, rso2 ) 0 . 8 v rs-232 receiver ? s input voltage, ( rxd, dcd ) 7 application notes 7.1 PSM2001ACD and user mcu interface method as shown in figure 3, the PSM2001ACD uses a standard spi to connect to the user ? s mcu, and the com m unication protocol conform s to the mcunet tm protocol. if the user ? s mcu doesn? t have an spi interface available, a com m on i/o port can be used to m a ke up an spi port. for detailed inform ation on the interface m e thods between the PSM2001ACD and the user mcu, please refer to the psm20xx fam ily w e bchip tm module user ? s guide, the application note on interfacing the psm20xx fam ily to 8051 t ype microcontrollers, and the mcunet tm protocol. p&s d a ta com co rpo r a t ion page 9 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 user mcu system /c s clk do di /int psm2001 acd 8 6 5 7 4 fi gur e 3 PSM2001ACD connects to mcu thr o ugh a s t andard spi interface 7.2 PSM2001ACD and user mcu interface t i ming the com m unication process between the PSM2001ACD and the mcu includes two steps: 1. PSM2001ACD sends data to the mcu 2. PSM2001ACD receives data from the mcu the process flow is shown in figure 4. ps m200 1acd s end s data to mc u p s m20 01ac d rece ive s d a ta fr om mcu /int fi gur e 4 one communi cati on pr ocess betw een PSM2001ACD and mcu the com m unication tim ing between the PSM2001ACD and the mcu conform s to the f o llowing rules: 1. first, the PSM2001ACD sends an /int signal to request a data exchange with the mcu; the f o llowing com m unication transaction will be controlled by the mcu; that is, the mcu sends chip select signal/cs and clock signal clk; 2. data will be transf erred in byte f o rm . the msb is transf erred f i rst until the lsb is received. p&s d a ta com co rpo r a t ion page 10 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 3. data is sam p led on the falling edge of clk and shifted on the rising edge. 4. w h en the PSM2001ACD doesn? t exchange data with the mcu, the mcu m u st set /cs and clk high. the tim ing of the PSM2001ACD sending data to the mcu is shown in figure 5. the fi rst byt e is the le ngt h n of the dat a pac k e t s t h e first byte data t h e s e cond byte data t h e third byte data ps m2 001ac d s e nd s /int /c s cl k do >1 0 s /int r ecover <4 s ? ? ? ? the n t h da ta by te the ( n + 1 )t h dat a byt e /i nt h o ld h i gh le ve l /c s cl k do p s m 200 1a cd f i nis h s e n d ing dat a fi gur e 5 t i mi ng of the PSM2001ACD sendi ng data to the mcu the enlar g ed clk and do tim ing is shown in figure 6. cl k do d 7 d6 d5 d 4 >4 s >4 s figur e 6 enlarged clk and do t i ming the tim ing of PSM2001ACD receiving data from the mcu is shown in figure 7. p&s d a ta com co rpo r a t ion page 11 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 th e f i rst byt e is t h e le ngt h m o f t h e dat a pa c k e t the fi rs t by te da t a the s e c ond by te da t a the t h i r d by te da t a /int hol d h i gh le ve l /c s cl k di >10 s ? ? ? ? the mt h byt e da ta the (m+1)t h byt e da ta /i n t ho ld hig h l e v e l /c s clk di ps m200 1acd finis h rece i v ing data o n e c o m m uni c a t ion proce s s is over figur e 7 t i ming of PSM2001ACD r eceiving data fr om the mcu the enlar g ed clk and di tim ing is shown in figure 8. cl k di d 7 d6 d5 d 4 >4 s >4 s figur e 8 enlarged clk and di t i ming p&s d a ta com co rpo r a t ion page 12 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 7.3 PSM2001ACD and server gateway interface method and configuration PSM2001ACD conform s to the mcuap tm protocol to interface with the server gateway . PSM2001ACD is able to interface with the gateway through any of the following three m odes. the following describes the configuration and connection of these m odes. 7.3.1 rs-232 mode as shown in figure 9, the PSM2001ACD connects to the server gateway through the rs-232 connection m ode. it should be noted that the rso1 pin of PSM2001ACD m u st be connected directly to the rsi pin. rxd and txd are the receiving pin and transm itting pin respectively . other unused pins m u st be left open. mc u /cs cl k do di /int 1 6 2 7 3 8 4 9 5 ps m2 00 1a cd tx d rxd rs o 1 rsi 17 18 10 9 dte socket 8 6 5 7 4 fi gur e 9 rs-232 connecti o n mode in the figure, dte is the abbreviation for data term inal equipm ent. 7.3.2 rs-485 mode as shown in figure 10, the PSM2001ACD connects to the server gateway through the rs-485 connection m ode. it should be noted that the rso2 pin of the PSM2001ACD m u st be connected to the rsi pin directly , and other unused pins m u st be left open. p&s d a ta com co rpo r a t ion page 13 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 mc u /cs clk do di /int psm20 01ac d a b rso 2 rs i 14 13 11 9 rs-4 85 so ck e t 8 6 5 7 4 fi gur e 10 rs-485 connecti o n mode 7.3.3 s t andard modem mode as shown in figure 1 1, the PSM2001ACD connects to the server gateway through the standard modem connection m ode. it should be noted that the rsi pin of the PSM2001ACD m u st be directly connected to the rso1 pin, and other unused pins m u st be left open. pin 7 and 8 of dce socket m u st be directly connected. mc u /c s clk do di /int 1 6 2 7 3 8 4 9 5 p s m 2 001a cd rx d txd rs i rs o 1 18 17 9 10 dce socket dc d 16 dt r 15 8 6 5 7 4 figur e 1 1 s t andard modem connection mode in the figure, dce is the abbreviation for data com m unication equipm ent. p&s d a ta com co rpo r a t ion page 14 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 7.4 id number in w e bchip tm product s both the w e bchip tm and the w e bchip tm m odule psm200xacd have an id num ber that consists of 8 bytes. in addition to a parity code of one byte, the rem a ining 7 bytes have up to 7.2x10 16 of coding capacity , which ensure that every w e bchip tm product has a unique id num ber . therefore, users will also have a unique id num ber when designing their own networking products with w e bchip tm products. w ith the help of the id num ber , users can com m unicate with the unique device anywhere in the world through the server gateway . the id num ber is usually printed on the bottom or side of the psm200xacd. p&s d a ta com co rpo r a t ion page 15 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 8 t r oubleshooting number t r oubles t r oubl eshooti n g 1 after connecting to the supply , the status indicator of PSM2001ACD doesn? t turn on 1. check if the hardware connection is correct 2. check if the PSM2001ACD is initiali zed by user ? s program correctly 2 after connecting to the supply , the status indicator of PSM2001ACD turns on, but the PSM2001ACD doesn? t work in rs-232 mode normally 1. check if the tx d of the PSM2001ACD is connected to pin 2 of dte, the rxd of th e psm2001ac d is connect ed to pin 3of dte, and pin 5 of dte is connected to gnd 2. check if th e b a ud rate of the PSM2001ACD is the same as th at of serial port of the pc 3. check if the s e rial port of the p c is connected correctly 4. check if p i n 9 of the PSM2001ACD is connected to pin 10 of the PSM2001ACD directly 5. check if th e i d of the ac ces s devi ce con f ig ured b y t h e gateway software is the same as that of the module labeled on the board 3 after connecting to the supply , the status indicator of PSM2001ACD turns on, but the PSM2001ACD doesn? t work in rs-485 mode normally 1 check if the serial por t of th e pc in which the w e bchipser ver tm software is programmed has a rs-232 to rs-485 connector 2 check if the i d of th e access device config ured b y the gateway software is the same as that of the module labeled on the board 3 check if the p s m2001acd is initi alized b y the user ? s prog ram correctly 4 check if terminal a and b of rs-485 are connected correctly 5 check if pin 9 of PSM2001ACD is connected to pin 1 1 of the PSM2001ACD directly 6 check if the b a ud rate of the p s m2001acd is the same as th at of serial port of the pc 4 after connecting to the supply , the status indicator of PSM2001ACD turns on, but the PSM2001ACD doesn? t work in modem mode normally 1. check if pin 9 of PSM2001ACD is connected to pin 10 of the PSM2001ACD directly 2. check if there is dial tone on the telephone line 3. check if user ? s program has a valid telephone number p&s d a ta com co rpo r a t ion page 16 of 17
PSM2001ACD w e bchip? module datasheet v e rsion 1.0 doc. number: inhd003 8/20/2001 9 dimensions please see the figure 12. psm 2 001acd fi gur e 12 di mensi ons of PSM2001ACD (uni t: mm) p&s d a ta com co rpo r a t ion page 17 of 17

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