W77C32_07 Datasheet, PDF (26/78 Pages) Winbond – 8-BIT MICROCONTROLLER

W77C32/W77C032A
Accumulator
Bit: 7
6
5
4
3
2
1
0
ACC.7 ACC.6 ACC.5 ACC.4 ACC.3 ACC.2 ACC.1 ACC.0
Mnemonic: ACC
Address: E0h
ACC.7-0: The A (or ACC) register is the standard 8052 accumulator.
Extended Interrupt Enable
Bit: 7
6
5
4
3
2
1
0
-
-
-
EWDI EX5 EX4 EX3 EX2
Mnemonic: EIE
Address: E8h
EIE.7-5: Reserved bits, will read high
EWDI: Enable Watchdog timer interrupt
EX5: External Interrupt 5 Enable.
EX4: External Interrupt 4 Enable.
EX3: External Interrupt 3 Enable.
EX2: External Interrupt 2 Enable.
B Register
Bit: 7
6
5
4
3
2
1
0
B.7
B.6
B.5
B.4
B.3
B.2
B.1
B.0
Mnemonic: B
Address: F0h
B.7-0: The B register is the standard 8052 register that serves as a second accumulator.
Extended Interrupt Priority
Bit: 7
6
-
-
5
4
3
2
1
0
-
PWDI PX5 PX4 PX3 PX2
Mnemonic: EIP
Address: F8h
EIP.7-5: Reserved bits.
PWDI:
Watchdog timer interrupt priority.
PX5: External Interrupt 5 Priority. 0 = Low priority, 1 = High priority.
PX4: External Interrupt 4 Priority. 0 = Low priority, 1 = High priority.
PX3: External Interrupt 3 Priority. 0 = Low priority, 1 = High priority.
PX2: External Interrupt 2 Priority. 0 = Low priority, 1 = High priority.
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