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Pin
1/0
SYMBOL
Signal name and Description
28
I
Vee
MVRAM: 5Vdc
29
I
COMCLK COMCLK1: Communication clock
30
I
C32KH
C32KH1: PTC clock
31
I
CPCLK
CPCLK 1: CPU clock signal
32
I
AEN
OMAEN1: OMA address enable
33
I
DMCLK
DMCLK1: CPU clock signal
34
0
EXMSL
EXMSLO: Expasded memory select
35
0
INTPS
PSNMI1: PS NMI signal
36
I
RASTH
RASTHO: RAS timing high (AOO
=
ODD)
37
I
RASTL
RASTLO: RAS timing low (AOO
=
EVEN)
38
I
SPKDR
SPKDRO: Speaker drive signal
39
I
RFSTR
RFSTR 1: Refresh start signal
40
GND
Ground
41
0
SPK
SPK1: Speaker on signal
42
0
R232CS
R232CSO: RS232C select
43
0
RTCCS
RTCCSO: RTC select
44
0
RTCRO
RTCROO: RTC real command
45
0
RTCWR
RTCWO: RTC write command
46
I
BMIRQ
BMIRQO: Built-in modem interrupt request
47
TEST2
Not used
48
TEST1
Not used
49
I
INT
INTO: RS232C interrupt
50
I
BMSPK
BMSPKO: Built-in modem speaker drive
E - 4
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