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3.4.8 Peripheral I/O registers
Address
FFFFF000H
Port 0
FFFFF002H
Port 1
FFFFF004H
Port 2
FFFFF006H
Port 3
FFFFF008H
Port 4
FFFFF00AH
Port 5
FFFFF00CH
Port 6
FFFFF00EH
Port 7
FFFFF010H
Port 8
FFFFF012H
Port 9
FFFFF014H
Port 10
FFFFF016H
Port 11
FFFFF018H
Port 12
FFFFF020H
Port 0 mode register
FFFFF022H
Port 1 mode register
FFFFF024H
Port 2 mode register
FFFFF026H
Port 3 mode register
FFFFF028H
Port 4 mode register
FFFFF02AH
Port 5 mode register
FFFFF02CH
Port 6 mode register
FFFFF032H
Port 9 mode register
FFFFF034H
Port 10 mode register
FFFFF036H
Port 11 mode register
FFFFF038H
Port 12 mode register
FFFFF04CH
Memory expansion mode register
FFFFF058H
Port 12 mode control register
FFFFF060H
Data wait control register
FFFFF062H
Bus cycle control register
FFFFF064H
System control register
FFFFF068H
Memory address output mode register
FFFFF070H
Power save control register
FFFFF074H
Processor clock control register
FFFFF078H
System status register
Note Resetting initializes registers to input mode and 00H cannot actually be read.
CHAPTER 3 CPU FUNCTIONS
Function Register Name
Bit Units for
Symbol
R/W
Manipulation
1 bit
8 bits
P0
R/W
{
{
P1
{
P2
{
P3
{
P4
{
P5
{
P6
{
P7
R
{
P8
{
P9
R/W
{
P10
{
P11
{
P12
{
PM0
{
PM1
{
PM2
{
PM3
{
PM4
{
PM5
{
PM6
{
PM9
{
PM10
{
PM11
{
PM12
{
MM
{
PMC12
DWC
BCC
{
SYC
MAM
W
{
PSC
R/W
{
PCC
{
SYS
(1/5)
After Reset
16 bits
Note
{
00H
{
{
{
{
{
{
{
Undefined
{
Note
{
00H
{
{
{
{
FFH
{
3FH
{
FFH
{
{
{
{
3FH
{
7FH
{
FFH
{
1FH
{
01H
{
00H
{
{
FFFFH
{
AAAAH
{
00H
{
{
C0H
{
03H
{
00H
75
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