Read Sharp UP-600 / UP-700 (serv.man25) Service Manual online
12. Option RAM interface
12-1. Interface
The expanded RAM connector terminals are shown in the table.
The 40-pin RAM is used for the connector.
Extension RAM connector terminals
Signal Name
Pin No.
Pin No.
Signal Name
+5V
1
2
N.C.
HWR
3
4
N.C.
GND
5
6
A21
A20
7
8
A19
A18
9
10
A17
A16
11
12
A15
A14
13
14
A13
A12
15
16
A11
A10
17
18
A9
A8
19
20
A7
A6
21
22
A5
A4
23
24
A3
A2
25
26
A1
A0
27
28
RD
D7
29
30
D6
D5
31
32
D4
D3
33
34
D2
D1
35
36
D0
RASPN2
37
38
VCKDC
GND
39
40
GND
13. Reset sequence
The reset sequence block diagram is shown below. Note that RESET
signal (system reset) and CKDCR signal (CKDC reset) are different
from each other.
signal (system reset) and CKDCR signal (CKDC reset) are different
from each other.
13-1. Power ON/OFF
The flow of signal processing at the time of the power supply turning
On/Off is as follows:
On/Off is as follows:
Table 19
<Power OFF>
Power supply
MPCA9
CPU
CKDC9
1
POFF
L
2
IRQ0
L
3
STOP
L
4
RESET
L
(System reset)
Table 20
<Power ON>
Power supply
MPCA9
CPU
CKDC9
1
POFF
H
2
STOP
H
3
RESET
H
(System reset)
The table below shows the timing chart.
POFF
CKDCR
(CKDC reset)
VCC
POFF
INT0
IRQ0
STOP
RESET
(System reset)
SLIDE
SW
SW
CKDC9
MPCA9
POWER
SUPPLY
SUPPLY
CPU
PG GOOD
RESET
STOP
SHEN
SCK
+5V,+12V
(POFF)
10ms MIN
8 PULSE
(System)
Power supply On
Power supply Off
Click on the first or last page to see other UP-600 / UP-700 (serv.man25) service manuals if exist.