
S3C94A5/F94A5 
RESET and POWER-DOWN 
8-5 
Table 8-1. Register Values after RESET
(Continued) 
Register Name 
Mnemonic 
Address 
Bit Values after RESET  
Dec 
Hex 
7 
6 
5 
4 
3 
2 
1 
0 
Basic timer control register 
BTCON 
220 
DCH 
0 
0 
0 
0 
0 
0 
0 
0 
Basic timer counter 
BTCNT 
221 
DDH 
0 
0 
0 
0 
0 
0 
0 
0 
Location DEH is not mapped 
System mode register 
SYM 
223 
DFH 
– 
– 
– 
– 
0 
0 
0 
0 
STOP control register 
STPCON 
224 
E0H 
0 
0 
0 
0 
0 
0 
0 
0 
SIO control register 
SIOCON 
225 
E1H 
0 
0 
0 
0 
0 
0 
0 
– 
SIO data register 
SIODATA 
226 
E2H 
0 
0 
0 
0 
0 
0 
0 
0 
SIO prescaler register 
SIOPS 
227 
E3H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 1 data register 
P1 
228 
E4H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 2 data register 
P2 
229 
E5H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 3 data register 
P3 
230 
E6H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 4 data register 
P4 
231 
E7H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 5 data register 
P5 
232 
E8H 
0 
0 
0 
0 
0 
0 
0 
0 
Location E9H is not mapped 
Port 1 control register (high byte) 
P1CONH 
234 
EAH 
– 
– 
0 
0 
0 
0 
0 
0 
Port 1 control register (low byte) 
P1CONL 
235 
EBH 
0 
0 
0 
0 
0 
0 
0 
0 
Port 1 interrupt control register 
P1INT 
236 
ECH 
– 
0 
0 
0 
0 
0 
0 
0 
Port 1 interrupt edge selection register 
(high byte) 
P1EDGEH 
237 
EDH 
– 
– 
0 
0 
0 
0 
0 
0 
Port 1 interrupt edge selection register 
(low byte) 
P1EDGEL 
238 
EEH 
0 
0 
0 
0 
0 
0 
0 
0 
Port 2 control register (high byte) 
P2CONH 
239 
EFH 
– 
– 
– 
– 
0 
0 
0 
0 
Port 2 control register (low byte) 
P2CONL 
240 
F0H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 2 pull-up control register 
P2PUR 
241 
F1H 
– 
– 
0 
0 
0 
0 
0 
0 
Port 3 control register (high byte) 
P3CONH 
242 
F2H 
– 
0 
0 
0 
0 
0 
0 
0 
Port 3 control register (low byte) 
P3CONL 
243 
F3H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 3 pull-up control register 
P3PUR 
244 
F4H 
– 
– 
0 
0 
0 
0 
0 
0 
Port 3 interrupt control register 
P3INT 
245 
F5H 
– 
– 
0 
0 
0 
0 
0 
0 
Port 3 interrupt edge selection register 
(high byte) 
P3EDGEH 
246 
F6H 
– 
– 
– 
– 
0 
0 
0 
0 
Port 3 interrupt edge selection register 
(low byte) 
 P3EDGEL 
247 
F7H 
0 
0 
0 
0 
0 
0 
0 
0 
Port 4 control register (high byte) 
P4CONH 
248 
F8H 
– 
– 
– 
– 
0 
0 
0 
0 
Port 4 control register (middle byte) 
P4CONM 
249 
F9H 
0 
0 
0 
0 
0 
0 
0 
0