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dear customers, about the change in the name such as "oki electric industry co. ltd." and "oki" in documents to oki semiconductor co., ltd. the semiconductor business of oki electric industry co., ltd. was succeeded to oki semiconductor co., ltd. on oc tober 1, 2008. therefore, please accept that although the terms and marks of "oki electric indust ry co., ltd.", ?oki electric?, and "oki" remain in the documents, they all have been changed to "oki semiconductor co., ltd.". it is a change of the company name, the co mpany trademark, and the logo, etc. , and not a content change in documents. october 1, 2008 oki semiconductor co., ltd. 550-1 higashiasakawa-cho, hachio ji-shi, tokyo 193-8550, japan http://www.okisemi.com/en/
? semiconductor msc1937-01 1/16 ? semiconductor msc1937-01 14/16-segment 16-digit display controller/driver general description msc1937-01 is a bi-cmos alphanumeric display controller designed to interface with either vacuum fluorescent display. msc1937-01 can drive displays with up to 16 digits with either 14 or 16 segments plus a decimal point and comma. msc1937-01 provides the interface with the microcomputer only by two signal lines: data and sclk. features ? can display up to 16 digits with either 14 or 16 segments plus comma/point. ? the number of display digits is programmable within 16. ? the brightness adjustment is programmable by 1/32 step. ? the display contents can be changed at any digit. ? built-in pla (64 types of ascii characters (capital letters only) can be displayed). ? executable in 1-byte instruction format ? drive capability output current : up to C20 ma (digit) C10 ma (segment) : plastic dip C5 ma (segment) : plastic qfp withstand voltage : 58v ? can also be used for led. ? pin compatible with 10937 manufactured by rockwell. ? supply voltage : 5v 10% ? package options: 40-pin plastic dip (dip40-p-600-2.54) (product name: MSC1937-01RS) 44-pin plastic qfp (qfp44-p-910-0.80-k) (product name: msc1937-01gs-k) e2c0026-27-y3 this version: nov. 1997 previous version: jul. 1996
? semiconductor msc1937-01 2/16 block diagram sga sgb sgc sgd sge sgf sgg sgh sgi sgj sgk sgl sgm sgn sgo sgp pnt tail ad16 ad15 ad14 ad13 ad12 ad11 ad10 ad 9 ad 8 ad 7 ad 6 ad 5 ad 4 ad 3 ad 2 ad 1 data sclk por v ss v dd a segment drivers (anode) segment decoder 64 16 pla 6 16 display data buffer timing and control 2 16 decimal pt. comma tail digit drivers (grid)
? semiconductor msc1937-01 3/16 input and output configuration ? schematic diagrams of logic portion input circuit ? schematic diagrams of logic portion output circuit ? schematic diagrams of driver output circuit v dd v ss v dd input v ss v dd v ss v dd output v ss output v ss v ss
? semiconductor msc1937-01 4/16 pin configuration (top view) 1 40 2 39 3 38 437 536 635 734 833 9 32 10 31 11 30 12 29 13 28 14 27 15 26 16 25 17 24 18 23 19 22 20 21 v ss ad 16 ad 15 ad 14 ad 13 ad 12 ad 11 ad 10 ad 9 ad 8 ad 7 ad 6 ad 5 ad 4 ad 3 ad 2 ad 1 v dd (gnd) a por pnt tail sgp sgo sgn sgm sgl sgk sgj sgi sgh sgg sgf sge sgd sgc sgb sga sclk data 40-pin plastic dip pin function 1 power supply (5v) 2 digit 16 output pin ... 17 digit 1 output pin 18 gnd 19 test pin 20 power-on-reset pin 21 data input pin 22 shift clock pin 23 segment a output pin ... 38 segment p output pin 39 tail output pin 40 point output pin ... ...
? semiconductor msc1937-01 5/16 pin configuration (top view) 11 10 9 8 7 6 5 4 3 2 1 34 35 36 37 38 39 40 41 42 43 44 23 24 25 26 27 28 29 30 31 32 33 sg n sg c sg d sg e sg f sg g sg h sg i sg j sg k sg l sg m ad 3 ad 4 ad 5 ad 6 ad 7 ad 8 ad 9 ad 10 ad 11 ad 12 nc sg o sg p tail pnt v dd (gnd) v ss ad 16 ad 15 ad 14 ad 13 22 nc sg b sg a sclk data v dd (gnd) por a v dd (gnd) ad 1 ad 2 21 20 19 18 17 16 15 14 13 12 44-pin plastic qfp pin function 1 no connection 2 digit 12 output pin ... 13 digit 1 output pin 14 gnd 15 test pin 16 power-on-reset pin 17 gnd 18 data input pin 19 shift clock pin ... 21 segment b output pin 20 segment a output pin pin function 22 no connection 23 segment c output pin ... 36 segment p output pin 37 tail output pin 38 point output pin 39 gnd 40 power supply (5v) 41 digit 16 output pin ... 44 digit 13 output pin ... ...
? semiconductor msc1937-01 6/16 pin description symbol type description power supply pin v ss gnd pin v dd input of display data/control data input from msb data i shift clock of shift register shifts data at the falling edge of sclk sclk i power-on-reset input. input of "h" level into this pin with the power turned on initializes this ic. the internal state after the initialization is as follows: 1) ad1 to ad16, sga to sgp, tail and pnt output are in the off state. 2) the duty cycle is set to "0". 3) the digit counter value is set to 16 digits. 4) the buffer pointer is set to ad1. 5) pin "a" is in the output mode. por i usually used as an output mode, and outputs 1/5 of the internal oscillation frequency. in the test mode, operates as an input pin. a i/o grid output pins the output format is an emitter follower. ad16 - ad1 o segment output pins the output format is an emitter follower. sga - sgp tail, pnt o
? semiconductor msc1937-01 7/16 absolute maximum ratings parameter symbol output voltage output current power supply voltage input voltage v v v ma rating unit v ss C58 to v ss + 0.3 C25 C0.3 to +6.5 C0.3 to v ss + 0.3 C20 v gg i load v ss v in digit segment storage temperature ?c C55 to +150 t stg dip qfp C10 recommended operating conditions parameter symbol "l" input voltage power supply voltage "h" input voltage v v v condition unit applicable to all input pins v il v ss v ih operating temperature ?c t op clock frequency oscillation frequency frame frequency f c f osc f fr 1.0 5.5 5.5 max. 85 typ. 0.0 4.5 3.6 min. C40 khz khz hz 195 500 500
? semiconductor msc1937-01 8/16 electrical characteristics dc characteristics parameter symbol "h" input current "l" input current "h" input voltage "l" input voltage v m a condition unit applicable to all input pins v ss = 5 v i load = C10ma i ih i il v ih v il v oh1 v v ss = 5 v i load = C10ma i ss (ta = C40 to +85?c, v ss = 5 v 10%, v gg = C53 v 0.5 v) 2.0 2.0 5.5 1.0 max. C2.0 C2.0 3.6 0.0 3.0 min. 2.5 ma no-load i out 10.0 supply current "h" output voltage v v v v oh2 "l" output voltage v m a v ih = v ss v il = 0.0 v digit segment v ss = 5 v i load = C5ma dip qfp 2.5 v ol output leakage current 10.0 v gg +3.0 m a "l" output current is determined by external pull-down resistor v out = v ss C v gg = C53 v ac characteristics parameter symbol frame frequency self oscillation frequency m s m s khz condition unit f fr f c f osc sclk "h" time t cw-h (ta = C40 to +85?c, v ss = 5 v 10%, v gg = C53 v 0.5 v) 332 500 548 max. 88 392 min. 1.0 data set-up time ns t cw-l 1.0 when mounted in a unit clock frequency sclk "l" time data hold time v ss rise time por pulse width por-sclk time internal processing time t ds t dh t prz t resw t ress t busy m s m s m s ns ns hz khz 200 100 100 200 200 40
? semiconductor msc1937-01 9/16 1) sclk, data timing 2) v ss set and data word transfer timing sclk data C3.6 v C1.0 v C3.6 v C1.0 v t cw-h t cw-l t ds t dh f c t busy v ss por sclk t prz t resw t ress msb side data word t busy lsb side msb side lsb side C4.5 v C0 v data word
? semiconductor msc1937-01 10/16 functional description the msb value of 8-bit serial data determines whether the input data into msc1937-01 is control data or display data. display data by setting msb = "0", the display data can be entered. the address of pla is specified by bit 5 to bit 0 following msb. table 1 provides the pla code table. command function msb bit 7 lsb bit 0 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 display data sets the display contents 02 0 x2 5 2 4 2 3 2 2 2 1 x: don't care control data the control data can be input by setting msb to "1". in addition, a command type and associated data with the command are determined by the bit 6 to bit 0. a) buffer pointer control this command changes the display contents only at an arbitrary digit. (the ram write address is set.) a decimal equivalent value of bits 0 - 3 should be set (desired digit number C2). (example) when specifying ad4, the set value is 2 (0010). specified digit set value of bits 0 to 3 specified digit set value of bits 0 to 3 ad1 ad2 ad3 ad4 ad5 ad6 ad7 ad8 15 (1111) 0 (0000) 1 (0001) 2 (0010) 3 (0011) 4 (0100) 5 (0101) 6 ( 0110 ) ad9 ad10 ad11 ad12 ad13 ad14 ad15 ad16 7 (0111) 8 (1000) 9 (1001) 10 (1010) 11 (1011) 12 (1100) 13 (1101) 14 ( 1110 ) command function msb bit 7 lsb bit 0 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 buffer pointer control specifies the ram address. 12 0 0102 3 2 2 2 1 digit counter control sets the number of display digits. 12 0 1002 3 2 2 2 1 duty cycle control sets the duty value. 12 0 112 4 2 3 2 2 2 1 test mode sets the test mode. 1x 002 4 xxx x: don't care
? semiconductor msc1937-01 11/16 b) digit counter control this command sets the number of display digits. set the desired number of digits in bits 0 to 3. c) duty cycle control this command sets the duty cycle of the driver output. this command allows the brightness to be adjusted by 1/32 step. as shown in figure 1, the blank time between digits or between the segments is specified by 1 bit time on the hardware. therefore, the set value ranges from 0 to 31. number of display digits set value of bits 0 to 3 number of display digits set value of bits 0 to 3 1 2 3 4 5 6 7 8 1 (0001) 2 (0010) 3 (0011) 4 (0100) 5 (0101) 6 (0110) 7 (0111) 8 (1000) 9 10 11 12 13 14 15 16 9 (1001) 10 (1010) 11 (1011) 12 (1100) 13 (1101) 14 (1110) 15 (1111) 0 (0000) sgn ad16 ad15 ad14 ad13 ad12 ad11 ad10 ad9 ad8 ad7 ad6 ad5 ad4 ad3 ad2 ad1 31 bit time 1 bit time 31 bit time 1 bit time 1 display cycle 512 bit time v gg v ss v gg v ss shown above is the timing when duty cycle = 31 (1 bit time = 5 1/f osc ) fig. 1 output timing
? semiconductor msc1937-01 12/16 d) test mode this mode is not a user function, but is used for outgoing inspection. table 1 pla code table 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f ; 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f 10 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d 3e 3f ; 16-segment display 14-segment display
? semiconductor msc1937-01 13/16 * to set the comma and decimal point, the display data at the display digit is input, then 2c and 2e data is input. note: only when 2c and 2e data is entered, the write address in the ram is not automatically incremented. for other data, the address specified by the buffer pointer control command is automatically incremented by one each time the display data is input. sga sgb sge sgf s g c s g d s g g s g h s s s s s s s s gg g g g g g g p i j k l m n o sga sgf s g c s g d s g g s g h s s s s s g g g g g i j k l m s g g s p n sgo pnt tail 16-segment 14-segment pnt tail
? semiconductor msc1937-01 14/16 application circuits +5 v Cv gg 10 m f r c e k r g 16 r a 16 typical anode (segment) driver circuit typical grid (digit) driver circuit vacuum fluorescent display msc1937-01 v ss v dd adn sgn por host system data clock data sclk
? semiconductor msc1937-01 15/16 (unit : mm) package dimensions notes for mounting the surface mount type package the sop, qfp, tsop, soj, qfj (plcc), shp and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). dip40-p-600-2.54 package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 6.10 typ.
? semiconductor msc1937-01 16/16 (unit : mm) notes for mounting the surface mount type package the sop, qfp, tsop, soj, qfj (plcc), shp and bga are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. therefore, before you perform reflow mounting, contact okis responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times). qfp44-p-910-0.80-k package material lead frame material pin treatment solder plate thickness package weight (g) epoxy resin 42 alloy solder plating 5 m m or more 0.35 typ. mirror finish

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