
Preliminary W79E225A/227A Data Sheet
Publication Release Date: December 14, 2007
- 43 -
Revision A2.0
ISP MODE
WFWIN
NOE
NCE
CTRL[3:0]
SFRAH,
SFRAL
X
X
Address in
SFRFD
Erase 4KB LD Flash
Erase 16/64K AP Flash0
Program 4KB LD Flash
Program 16/64KB AP
Flash0
Read 4KB LD Flash
Read
16/64KB
Flash0
1
0
1
1
1
1
0
0
0
0010
0010
0001
X
X
Data in
0
1
0
0001
Address in
Data in
1
0
0
0000
Address in
Data out
AP
0
0
0
0000
Address in
Data out
PORT 3
Bit:
7
6
5
4
3
2
1
0
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
Mnemonic: P3
Address: B0h
BIT
NAME
FUNCTION
7-0
P3
General purpose I/O port. Each pin also has an alternate input or output function
that is controlled by other SFRs. The alternate function is enabled if the
corresponding port latch bit is set to 1.
ALTERNATE FUNCTION
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
RD Strobe for read from external RAM.
WR Strobe for write to external RAM.
T1/IC1/QEB; Timer/counter 1 external count input/Input Capture 1/QEI input B.
T0/IC0/QEA; Timer/counter 0 external count input/Input Capture 0/QEI input A.
/INT0 External interrupt 1.
/INT1 External interrupt 0.
TxD Serial port output.
RxD Serial port input.
PORT 5
Bit:
7
6
5
4
3
2
1
0
-
-
-
-
-
-
P5.1
P5.0
Mnemonic: P5
Address: B1h
BIT
7-2
NAME
FUNCTION
-
Reserved.
General purpose I/O port. Each pin also has an alternate input or output
function. This port can not support bit addressable.
1-0
P5