Zilog
Z86E30/E31/E40
Z8 4K OTP Microcontroller
Table 8. 28-Pin EPROM
Pin Identification*
Pin #
1-3
4-7
8
D1
XXX
D0
XXX
A3
XXX
VSS
XXX
A2
XXX
A1
XXX
A0
XXX
A4
D7
D6
D5
D4
D3
D2
Symbol
D5-D7
A4-A7
V
CC
NC
/CE
/OE
EPM
V
PP
A8-A9
A11
A10
/PGM
A0-A2
V
SS
A3
D0-D4
Function
Data 5,6,7
Address 4,5,6,7
Power Supply
No connection
Chip Select
Output Enable
EPROM Prog.
Mode
Prog. Voltage
Address 8,9
Address 11
Address 10
Prog. Mode
Address 0,1,2
Ground
Address 3
Data 0,1,2,3,4
Direction
In/Output
Input
1
4
XXX
A5
XXX
A6
XXX
A7
VCC
XXX
XXX
NC
XXX
/CE
XXX
/OE
5
1
26
25
28-Pin PLCC
9
10
11
12
13
14-15
16
17
18
19-21
22
23
24-28
Input
Input
Input
Input
Input
Input
Input
Input
Input
Input
In/Output
11
12
19
18
Figure 12. EPROM Programming Mode
28-Pin PLCC Pin Configuration
EPM
VPP
A8
A9
A11
A10
/PGM
Notes:
*Pin Identification and Configuration identical on DIP and
Cerdip Window Lid style packages.
DS97Z8X0500
PRELIMINARY
11
ZILOG [ ZILOG, INC. ]
