B. Specifications
128
J5 (Memory Expansion)
J5 is a 54-pin (dual 27-pin) socket with 0.1 inch contact spacing. J5 includes memory
address, data, and control signals for supporting RAM memory expansion and Flash
boot modules. The pin assignments are given in the "J5 Memory Expansion Pinout"
table below. The mating modules are the Ziatech ZT 96047 for an additional 4 Mbytes
of RAM and the Ziatech ZT 95190 for a flash boot module.
J5 Memory Expansion Pinout
Pin#
Signal
Type
Description
Pin#
Signal
Type
Description
1
A1
Out
CPU Address
28
/RD
Out
Read enable
2
A2
Out
CPU Address
29
/MCS
Out
Module select
3
A3
Out
CPU Address
30
/CE4
Out
Chip select 4
4
A4
Out
CPU Address
31
/CE5
Out
Chip select 5
5
A5
Out
CPU Address
32
/CE6
Out
Chip select 6
6
A6
Out
CPU Address
33
/CE7
Out
Chip select 7
7
A7
Out
CPU Address
34
/WE
Out
Write strobe
8
A8
Out
CPU Address
35
/OE
Out
Output enable
9
A9
Out
CPU Address
36
RSV
------
Reserved
10
A10
Out
CPU Address
37
D15
In/Out
Data 15
11
A11
Out
CPU Address
38
D14
In/Out
Data 14
12
GND
------
Ground
39
D13
In/Out
Data 13
13
VCC
------
+5 Volts
40
D12
In/Out
Data 12
14
A12
Out
CPU Address
41
D11
In/Out
Data 11
15
A13
Out
CPU Address
42
VCC
------
+5 Volts
16
A14
Out
CPU Address
43
GND
------
Ground
17
A15
Out
CPU Address
44
D10
In/Out
Data 10
18
A16
Out
CPU Address
45
D9
In/Out
Data 9
19
A17
Out
CPU Address
46
D8
In/Out
Data 8
20
A18
Out
CPU Address
47
D7
In/Out
Data 7
21
A19
Out
CPU Address
48
D6
In/Out
Data 6
22
/CE0
Out
Chip select 0
49
D5
In/Out
Data 5
23
/CE1
Out
Chip select 1
50
D4
In/Out
Data 4
24
/CE2
Out
Chip select 2
51
D3
In/Out
Data 3
25
/CE3
Out
Chip select 3
52
D2
In/Out
Data 2
26
/BLE
Out
Byte Low Enable
53
D1
In/Out
Data 1
27
/MPR
Out
Module present
54
D0
In/Out
Data 0
