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CONTROL REGISTERS
Register name
Timer 0 counter register
Timer 0 data register
Timer 0 control register
Clock control register
System flags register
Stack pointer register
MDS special register
Basic timer control register
Basic timer counter
Test mode control register
System mode register
NOTES:
1.
– : Not mapped or not used, x: Undefined
2.
The factory test mode register, FTSTCON, is for factory use only. Its value should always be '00H' during the normal
operation.
4-2
Table 4-1. System and Peripheral Control Registers
Mnemonic
T0CNT
T0DATA
T0CON
Location D3H is not mapped
CLKCON
FLAGS
Locations D6H–D8H are not mapped
SP
Location DAH is not mapped
MDSREG
BTCON
BTCNT
FTSTCON
SYM
Address & Location
Address
R/W
D0H
R
D1H
R/W
D2H
R/W
D4H
R/W
D5H
R/W
D9H
R/W
DBH
R/W
DCH
R/W
DDH
R
DEH
W
DFH
R/W
S3C9454B/F9454B
RESET value (Bit)
7
6
5
4
3
2
0
0
0
0
0
0
1
1
1
1
1
1
0
0
–
–
0
–
0
–
–
0
0
–
x
x
x
x
–
–
x
x
x
x
x
x
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
–
–
0
0
0
0
–
–
–
–
–
0
1
0
0
0
1
1
0
0
–
–
–
–
x
x
0
0
0
0
0
0
0
0
0
0
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