W78ERD2 Datasheet, PDF (50/72 Pages) Winbond – 8-BIT MICROCONTROLLER

W78ERD2
SFRCN (C7)
BIT
7
NAME
-
6
WFWIN
5
4
3, 2, 1, 0
OEN
CEN
CTRL[3:0]
FUNCTION
Reserve.
On-chip Flash EPROM bank select for in-system programming.
= 0: 64K bytes Flash EPROM bank is selected as destination for re-
programming.
= 1: 4K bytes Flash EPROM bank is selected as destination for re-
programming.
Flash EPROM output enable.
Flash EPROM chip enable.
The flash control signals
MODE
Erase 64KB AP Flash
EPROM
Program 64KB AP Flash
EPROM
Read 64KB AP Flash
EPROM
Erase 4KB LD Flash
EPROM
Program 4KB LD Flash
EPROM
Read 4KB LD Flash
EPROM
WFWIN
0
0
0
1
1
1
CTRL<3:0>
0010
0001
0000
0010
0001
0000
OEN CEN SFRAH, SFRAL
1
0
X
1
0
Address in
0
0
Address in
1
0
X
1
0
Address in
0
0
Address in
SFRFD
X
Data in
Data out
X
Data in
Data out
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