W79E225A_08 Datasheet, PDF (43/203 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E225A/226A/227A Data Sheet
ISP MODE
Erase 4KB LD Flash
Erase 16/32/64K AP
Flash
Program 4KB LD Flash
Program 16/32/64KB
AP Flash
Read 4KB LD Flash
Read 16/32/64KB AP
Flash
WFWIN
1
0
1
0
1
0
NOE
1
1
1
1
0
0
NCE
0
0
0
0
0
0
CTRL[3:0]
0010
0010
0001
0001
0000
0000
SFRAH,
SFRAL
X
X
Address in
Address in
Address in
Address in
SFRFD
X
X
Data in
Data in
Data out
Data out
PORT 3
Bit:
7
P3.7
Mnemonic: P3
BIT NAME
7-0 P3
6
5
4
3
2
1
0
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
Address: B0h
FUNCTION
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.
P3.7
P3.6
P3.5
P3.4
P3.3
P3.2
P3.1
P3.0
ALTERNATE FUNCTION
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
-
Mnemonic: P5
BIT NAME
7-2 -
1-0 P5
6
5
4
3
2
1
0
-
-
-
-
-
P5.1
P5.0
Address: B1h
FUNCTION
Reserved.
General purpose I/O port. Each pin also has an alternate input or output
function. This port can not support bit addressable.
- 43 -
Publication Release Date: April 15, 2008
Revision A4.0