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| Datasheet File OCR Text: |
| AM186EM MICROCONTROLLER BLOCK DIAGRAM INT2/INTA0 INT3/INTA1/IRQ CLKOUTA INT4 INT1/SELECT INT0 NMI TMROUT0 TMRIN0 TMROUT1 DRQ0 DRQ1 CLKOUTB TMRIN1 X2 X1 Timer Control Unit 0 1 (WDT) 2 Interrupt Control Unit Max Count B Registers Max Count A Registers 16-Bit Count Registers Control Registers DMA Unit 0 1 20-Bit Source Pointers 20-Bit Destination Pointers 16-Bit Count Registers Control Registers Control Registers VCC GND Clock and Power Management Unit Control Registers Control Registers RES PIO Unit PIO31- PIO0* Control Registers ARDY SRDY S2-S0 DT/R DEN HOLD HLDA S6/ CLKDIV2 UZI Refresh Control Unit PSRAM Control Unit Control Registers Control Registers Asynchronous Serial Port TXD RXD Bus Interface Unit Execution Unit Chip-Select Unit Control Registers Synchronous Serial Interface RD WHB A19-A0 AD15-AD0 WR BHE/ADEN ALE WLB LCS/ONCE0 MCS3/RFSH MCS2-MCS0 SCLK PCS6/A2 PCS5/A1 PCS3-PCS0 SDEN0 SDEN1 SDATA UCS/ONCE1 Note: * All PIO signals are shared with other physical pins. See the pin descriptions beginning on page 24 and Table 2 on page 28 for information on shared function. |
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