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參數(shù)資料
型號(hào): W79E648
廠商: WINBOND ELECTRONICS CORP
英文描述: Fast 8051 Compatible microcontroller with a redesigned Processor
中文描述: 快速8051兼容微控制器重新設(shè)計(jì)的處理器
文件頁數(shù): 19/80頁
文件大小: 407K
代理商: W79E648
Preliminary W79E648
Publication Release Date: 05/31/2004
- 19 - Revision A1
Software Reset
Set CHPCON = 0X83, timer and enter IDLE mode. CPU will reset and restart from APFlash after time
out.
Port 2
Bit:
7
6
5
4
3
2
1
0
P2.7
P2.6
P2.5
P2.4
P2.3
P2.2
P2.1
P2.0
Mnemonic: P2
Address: A0h
P2.7-0: Port 2 is a bi-directional I/O port with internal pull-ups. This port also provides the upper
address bits for accesses to external memory.
Port 4 Chip-select Polarity
Bit:
7
6
5
4
3
-
2
-
1
-
0
P43INV P42INV P42INV P40INV
PUP0
6.1.1
Mnemonic: P4CSIN
Address: A2h
P4xINV: The active polarity of P4.x when set it as chip-select signal. High = Active High. Low = Active
Low.
PUP0: Enable Port 0 weak pull up.
Port 4
Bit:
7
6
5
4
3
2
1
0
-
-
-
-
P4.3
P4.2
P4.1
P4.0
Mnemonic: P4
Address: A5h
P4.3-0: Port 4 is a bi-directional I/O port with internal pull-ups. Port 4 can not use bit-addressable
instruction (SETB or CLR).
Interrupt Enable
Bit:
7
6
5
4
3
2
1
0
EA
ES1
ET2
ES
ET1
EX1
ET0
EX0
Mnemonic: IE
Address: A8h
EA:
ET2:
ES:
ET1:
EX1:
ET0:
EX0:
Global enable. Enable/disable all interrupts.
Enable Timer 2 interrupt.
Enable Serial Port 0 interrupt.
Enable Timer 1 interrupt
Enable external interrupt 1
Enable Timer 0 interrupt
Enable external interrupt 0
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