Sharp UP-3301 Service Manual page 63

13. Reset sequence
The reset sequence block diagram is shown below. Note that the
RESET signal (system reset) and CKDCR signal (CKDC reset) are dif-
ferent from each other.
VCC
SLIDE
SW
STOP
CPU
RESET
(System reset)
IRQ0
Fig. 14
13-1. Power ON/OFF
The flow of signal processing at the time of the power supply turning
On/Off is as follows:
Table 19
<Power OFF>
Power supply MPCA8
POFF 3 L
1
IRQ0 3 L
2
3
4
Table 20
<Power ON>
Power supply MPCA8
POFF 3 H
1
2
The table below shows the timing chart.
+5V,+12V
20ms is assured when as power is off.
PG GOOD
(POFF)
200ms
RESET
MIN
(System)
STOP
SHEN
SCK
Fig. 15
CKDCR
(CKDC reset)
POFF
CKDC9
POFF
POWER
SUPPLY
MPCA8
INT0
CPU CKDC9
STOP 3 L
RESET 3 L
(System reset)
CPU CKDC9
RESET 3 H
(System reset)
10ms MIN
8 PULSE
UP-3301US CIRCUIT DESCRIPTION
13-2. MRS, SRV reset
In the UP-3301, the MRS, SRV resetting is selected and executed by
the key which has been depressed when the CKDC reset is released to
start the system.
(In the case of a MRS, security is added by a key operation equivalent
to a password.)
Flow chart
Start
CKDC start
condition read
Hard reset
start?
Yes
*Slide Switch
operation
MRS1 key
ON?
Yes
PASSWORD
judgement
No
OK?
Yes
SRV reset
MRV reset
14. Drawer
The UP-3301 can use up to 2 optional external drawers.
14-1. Drawer solenoid drive
P34 ~ P37 inside the CPU are allocated for the port output of the drawer
solenoid drive.
Built-in port Signal name
P34 DR0
P35 DR1
P36 DR2
P37 DR3
One port corresponds to one drawer. Theoretically, it is possible to drive
multiple drawers at the same time, but this processing must be inhibited
by using software, because of power supply capacity and driver hard-
ware factors. If a power failure is detected, the drawer solenoid drive
must be stopped as soon as possible.
*The drawer solenoid drive time must be controlled in the range of 40
ms to 50 ms by the timer.
– 61 –
No
No
Normal
start?
SRV reset
Yes
Recovery
No
MRS2 key
ON?
Yes
PASSWORD
judgement
No
OK?
Yes
SRV reset
10-key position
input sequence
MRV reset
Fig. 16
Table 22
Remarks
Drawer 1 (optional drawer)
Drawer 2 (optional drawer)
Reserved
Reserved