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Registers Format • 21
3.2 I/O Address Map
All the 48H registers are 8 bits. The users can access these registers
only by 8 bits I/O instructions. The following ta ble shows the registers map,
including descriptions and their offset addresses relative to the base
address. Please refer to the chapter 4 for more detailed operation of every
registers.
Offset Write Read Boards
0x00 P1A P1A PCIDIO 24H
0x01 P1B P1B PCIDIO 48H
0x02 P1C P1C PCIDIO 96H
0x03 P1Ctrl Not used
0x04 P2A P2A PCIDIO 48H
0x05 P2B P2B PCIDIO 96H
0x06 P2C P2C
0x07 P2Ctrl Not used
0x08 P3A P3A P1AE
(1)
PCIDIO 96H
0x09 P3B P3B P1BE
(1)
0x0A P3C P3C P1CE
(1)
(1)
doesn't apply to
0x0B P3Ctrl Not used Not used PCIDIO series
0x0C P4A P4A P2AE
(1)
0x0D P4B P4B P2BE
(1)
0x0E P4C P4C P2CE
(1)
0x0F P4Ctrl Not used Not used
0x10 Timer/Counter #0 Timer/Counter #0 PCIDIO 24H
0x11 Timer/Counter #1 Timer/Counter #1 PCIDIO 48H
0x12 Timer/Counter #2 Timer/Counter #2 PCIDIO 96H
0x13
Timer/Counter
Mode Control
Timer/Counter
Mode Status
not applicable
0x20
ISC: Interrupt
Source Control
Not used
0x30 Clear Interrupt Not used