W79E825A Datasheet, PDF (46/127 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E825A/824A/823B/822B Data Sheet
B REGISTER
Bit: 7
6
5
4
3
2
1
0
B.7
Mnemonic: B
BIT NAME
7-0 B.[7:0]
B.6
B.5
B.4
B.3
B.2
B.1
B.0
Address: F0h
FUNCTION
The B register is the standard 8052 register that serves as a second accumulator.
PORT 0 DIGITAL INPUT DISABLE
Bit: 7
6
5
4
3
2
1
0
P0ID.7
P0ID.6
P0ID.5
P0ID.4
P0ID.3
P0ID.2
Mnemonic: P0ID
BIT NAME
FUNCTION
Enable/Disable Port 0 digital inputs.
7~0 P0ID.[7:0] 0: Enable Port 0 digital inputs.
1: Disable Port 0 digital inputs.
P0ID.1
P0ID.0
Address: F6h
INTERRUPT HIGH PRIORITY 1
Bit: 7
6
5
4
3
2
1
0
-
-
PPWMH PWDIH PC2H
PC1H
PKBH
PI2H
Mnemonic: IP1H
Address: F7h
BIT NAME
FUNCTION
7-
Reserved.
6-
Reserved.
5 PPWMH 1: To set interrupt high priority of PWM’s brake is highest priority level.
4 PWDIH 1: To set interrupt high priority of Watchdog is highest priority level.
3 PC2H
1: To set interrupt high priority of Comparator 2 is highest priority level.
2 PC1H
1: To set interrupt high priority of Comparator 1 is highest priority level.
1 PKBH
1: To set interrupt high priority of Keypad is highest priority level.
0 PI2H
1: To set interrupt high priority of I2C is highest priority level.
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