w925e625 ETC-unknow, w925e625 Datasheet - Page 21

• Manufacturer Part Number: w925e625
• Description: 8-bit Cid Microcontroller
• Manufacturer: ETC-unknow

PORT 4
P4.7-0: Port 4 is a I/O port with internal pull-high resistor. P4 can be selected as input or output mode
INTERRUPT ENABLE
EA:
ES1: Enable Serial port interrupt
ET1: Enable Timer 1 interrupt
EX1: Enable external interrupt 1
ET0: Enable Timer 0 interrupt
EX0: Enable external interrupt 0
P4 I/O PORT CONTROL
P4IO: P4 pins I/O control.
PORT 3
P4.4
P4.2
P4.1
P4.0
Global enable. Enable/disable all interrupts.
by the P4IO register, at initial reset, P4IO is set to 0FFh, P4 is used as input mode. When
P4IO is set to 00h, P4 is used as CMOS output mode. Special function of P4 is described
below.
1: input mode
0: output mode
Mnemonic: P4
Mnemonic: IE
Mnemonic: P4IO
Mnemonic: P3
VPOS
VNEG
SDATA
SCLK
Bit:
Bit:
Bit:
Bit:
P4.7IO
P4.7
P3.7
EA
7
7
7
7
Positive input of the comparator
Negative input of the comparator
Serial port data I/O
Serial port clock I/O
P4.6IO
P4.6
P3.6
ES1
6
6
6
6
P4.5IO
P4.5
P3.5
5
5
5
5
-
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P4.4IO
P4.4
P3.4
4
4
4
4
-
P4.3IO
P4.3
P3.3
ET1
Publication Release Date: July 4, 2005
3
3
3
3
Address: A6h
Address: Aeh
Address: B0h
Address: A8h
(initial=FFH,input mode)
(initial=00H)
(initial=FFH)
(initial=FFH,input mode)
P4.2IO
P4.2
P3.2
EX1
2
2
2
2
W925E/C625
P4.1IO
P4.1
P3.1
ET0
1
1
1
1
Revision A10
P4.0IO
P4.0
P3.0
EX0
0
0
0
0