User`s manual
PK2200 Interrupts and Addresses s D-89
Processor Register Addresses
The Z180s I/O-device registers occupy the first 40
H
addresses.
Table D-4. Z180 Internal I/O Device Registers
Address Name Description
0x00 CNTLA0 Serial Channel 0, Control Register A
0x01 CNTLA1 Serial Channel 1, Control Register A
0x02 CNTLB0 Serial Channel 0, Control Register B
0x03 CNTLB1 Serial Channel 1, Control Register B
0x04 STAT0 Status Register, Serial Channel 0
0x05 STAT1 Status Register, Serial Channel 1
0x06 TDR0 Transmit Data Register, Serial Channel 0
0x07 TDR1 Transmit Data Register, Serial Channel 1
0x08 RDR0 Receive Data Register, Serial Channel 0
0x09 RDR1 Receive Data Register, Serial Channel 1
0x0A CNTR Clocked Serial Control Register
0x0B TRDR Clocked Serial Data Register
0x0C TMDR0L Timer Data Register, Channel 0, low
0x0D TMDR0H Timer Data Register, Channel 0, high
0x0E RLDR0L Timer Reload Register, Channel 0, low
0x0F RLDR0H Timer Reload Register, Channel 0, high
0x10 TCR Timer Control Register
0x11–13 — Reserved
0x14 TMDR1L Timer Data Register, Channel 1, low
0x15 TMDR1H Timer Data Register, Channel 1, high
0x16 RLDR1L Timer Reload Register, Channel 1, low
0x17 RLDR1H Timer Reload Register, Channel 1, high
0x18 FRC Free-Running Counter
0x19–1E
—
Reserved
0x1F CCR CPU control register for the 18 MHz chip.
Write 0x80 to get 18.432 MHz. Write 0 to
get 9.216 MHz.
0x20 SAR0L DMA Source Address, Channel 0, low
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