W79E225A_08 Datasheet, PDF (32/203 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E225A/226A/227A Data Sheet
WD1, WD0: Mode Select bits:
These bits determine the time-out periods for the Watchdog Timer. The reset time-out period is 512
clocks more than the interrupt time-out period.
WD1
0
0
1
1
WD0
0
1
0
1
INTERRUPT TIME-OUT
2¹⁷
2²⁰
2²³
2²⁶
RESET TIME-OUT
2¹⁷ + 512
2²⁰ + 512
2²³ + 512
2²⁶ + 512
MD2, MD1, MD0: Stretch MOVX select bits:
MD2 MD1
MD0
STRETCH VALUE
0
0
0
0
0
0
1
1
0
1
0
2
0
1
1
3
1
0
0
4
1
0
1
5
1
1
0
6
1
1
1
7
MOVX DURATION
2 machine cycles
3 machine cycles (Default)
4 machine cycles
5 machine cycles
6 machine cycles
7 machine cycles
8 machine cycles
9 machine cycles
CLOCK CONTROL 1
Bit:
7
6
5
4
3
2
1
-
-
-
-
-
-
CCDIV1
Mnemonic: CKCON1
Address: 8Fh
BIT
NAME
FUNCTION
7-2
-
Reserved.
Timer 3 clock select.
CCDIV1 CCDIV0 Timer 3 clock
1-0
CCDIV
0
0
Fosc
0
1
Fosc/4
1
0
Fosc/16
1
1
Fosc/32
0
CCDIV0
PORT 1
Bit:
7
P1.7
Mnemonic: P1
6
P1.6
5
P1.5
4
P1.4
3
P1.3
2
1
P1.2
P1.1
Address: 90h
0
P1.0
- 32 -
Publication Release Date: April 15, 2008
Revision A4.0