W77L32 Datasheet, PDF (26/76 Pages) Winbond – 8-BIT MICROCONTROLLER

W77L32/W77L032A/W77M032A
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.
6.3.1.20 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
-
-
Mnemonic: EIP
5
4
3
2
1
0
-
PWDI PX5 PX4 PX3 PX2
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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