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E.
3 PIN DBSCRIP"l.'ION
TABLE E-l
Pin Description
Pin
I/O
SYMBOL
Signal name and Description
1
0
RAS1H
RAS1 HO: Memory RAS timing signal
2
0
RAS1L
RAS1 LO: Memory RAS timing signal
3
I
Vee
MVRAM: 5Vdc
4
0
RASOH
RASOHO: Memory RAS timing signal
5
0
RASOL
RASOLO: Memory RAS timing signal
6
0
CAS
CASO: Memory CAS timing signal
7
0
DRA81: Memory ROW/COL address
8
DRA71 -- DRA 11:
.....
0
Memory ROW/COL address
14
15
GND
Ground
16
0
DRA01: Memory ROW/COL address
17
0
IRQ4
IRQ41: Interrupt request 4
18
0
IRQ3
IRQ31: Interrupt request 3
19
0
CMCK 1 (DACKOO): Communication Clock! refresh
(Expansion Interface)
20
0
MDSLO/IRQ41:
When the modem card is used, modem select signal,
and when I/F, interrupt request 4
21
I
SPTON
SPTONO: Speaker drive signal
22
0
BRDIS
BRDIS1: Back-up RAM disable signal
23
0
BMDSL
BMDSLO: Built-in modem select signal
24
0
BMPOF
BMPOFO: Built-in modem power off signal
25
0
HDDSL
HDDSLO: HDD select
26
0
PNLOF
PNLOFO: Panel close signal
27
0
OUT2
OUT21: RS232C interrupt mask
E - 3
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