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P89LPC985 Datasheet(PDF) 21 Page - NXP Semiconductors |
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P89LPC985 Datasheet(HTML) 21 Page - NXP Semiconductors |
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21 / 85 page  xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx [1] BRGR1 and BRGR0 must only be written if BRGEN in BRGCON SFR is logic 0. If any are written while BRGEN = 1, the result is unpredictable. [2] All ports are in input only (high-impedance) state after power-up. [3] The RSTSRC register reflects the cause of the P89LPC980/982/983/985 reset except BOIF bit. Upon a power-up reset, all reset source flags are cleared except POF and BOF; the power-on reset value is x011 0000. [4] The only reset sources that affect these SFRs are power-on reset and watchdog reset. [5] On power-on reset and watchdog reset, the TRIM SFR is initialized with a factory preprogrammed value. Other resets will not cause initialization of the TRIM register. [6] After reset, the value is 1110 01x1, i.e., PRE2 to PRE0 are all logic 1, WDRUN = 1 and WDCLK = 1. WDTOF bit is logic 1 after watchdog reset and is logic 0 after power-on reset. Other resets will not affect WDTOF. TL4 Timer/Counter 4 Low Byte CBH 00 0000 0000 TINTF Timer/Counters 2/3/4 Overflow and External Flags CEH - - TF4 EXF4 TF3 EXF3 TF2 EXF2 00 0000 0000 TRIM Internal oscillator trim register 96H RCCLK ENCLK TRIM.5 TRIM.4 TRIM.3 TRIM.2 TRIM.1 TRIM.0 [4][5] WDCON Watchdog control register A7H PRE2 PRE1 PRE0 - - WDRUN WDTOF WDCLK [4][6] WDL Watchdog load C1H FF 1111 1111 WFEED1 Watchdog feed 1 C2H WFEED2 Watchdog feed 2 C3H Table 4. Special function registers - P89LPC980/982 …continued * indicates SFRs that are bit addressable. Name Description SFR addr. Bit functions and addresses Reset value MSB LSB Hex Binary Table 5. Extended special function registers - P89LPC980/982[1] Name Description SFR addr. Bit functions and addresses Reset value MSB LSB Hex Binary BODCFG BOD configuration register FFC8H - - - - - BOICFG2 BOICFG1 BOICFG0 [2] CLKCON CLOCK Control register FFDEH CLKOK - WDMOD XTALWD CLKDBL FOSC2 FOSC1 FOSC0 [3] 1000 xxxx |
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