Samsung S3P80C5 User Manual page 206

S3P80C5/C80C5/C80C8
Register Name
Port 1 control register (high byte)
Port 1 control register (low byte)
Port 1 pull-up enable register
Port 2 control register
Port 0 interrupt enable register
Port 0 interrupt pending register
Counter A control register
Counter A data register (high byte)
Counter A data register (low byte)
Timer 1 counter register (high byte)
Timer 1 counter register (low byte)
Timer 1 data register (high byte)
Timer 1 data register (low byte)
Timer 1 control register
Stop control register
Basic timer counter
External memory timing register
Interrupt priority register
NOTES:
1. Although the SYM register is not used for the S3P80C5/C80C5/C80C8, SYM.5
should always be "0". If you accidentally write a 1 to this bit during normal operation, a system malfunction may occur.
2. Except for T0CNT, IRQ, T1CNTH, T1CNTL, and BTCNT, which are read-only, all registers in set 1 are
read/write addressable.
3. You cannot use a read-only register as a destination field for the instructions OR, AND, LD, and LDB.
4. Interrupt pending flags are noted by shaded table cells.
Table 8-1. Set 1 Register Values After Reset (Continued)
Mnemonic
P1CONH
P1CONL
P1PUR
Location EDH–EFH is not mapped.
P2CON
P0INT
P0PND
CACON
CADATAH
CADATAL
T1CNTH
T1CNTL
T1DATAH
T1DATAL
T1CON
STOPCON
Locations FCH is not mapped.
BTCNT
EMT
IPR
Address
Dec Hex 7 6
234 EAH 0 0
235 EBH 0 0
236 ECH 0 0
240 F0H – –
241 F1H 0 0
242 F2H 0 0
243 F3H 0 0
244 F4H 1 1
245 F5H 1 1
246 F6H 0 0
247 F7H 0 0
248 F8H 1 1
249 F9H 1 1
250 FAH 0 0
251 FBH 0 0
× ×
253 FDH
254 FEH 0 1
× ×
255 FFH
RESET RESET
and POWER-DOWN
Bit Values After Reset
5 4 3 2
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
0 0 0 0
1 1 1 1
1 1 1 1
0 0 0 0
0 0 0 0
1 1 1 1
1 1 1 1
0 0 0 0
0 0 0 0
× × × ×
1 1 1 1
× × × ×
1 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
1 1
1 1
0 0
0 0
1 1
1 1
0 0
0 0
× ×
0 –
× ×
8-5