Sharp ER-A770 Manual page 54

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.
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
1 POFF L
2 IRQ0
3
4
Table 20
<Power ON>
Power supply MPCA8
1 POFF H
2
The table below shows the timing chart.
Power supply On
+5V,+12V
PG GOOD
(POFF)
RESET
(System)
STOP
SHEN
SCK
Fig. 15
13-2. MRS, SRV reset
The ER-A770 does not have the mode switch. The procedure for
resetting MRS, SRV is different from that of conventional cash regis-
ters.
in the ER-A770, MRS, SRV resetting is selected and executed by the
key which has bee depressed when the CKDC reset is released to
start the system.
(In the case of MRS, security is added by a key operation equivalent
to a pass word.)
CKDCR
(CKDC reset)
POFF
CKDC9 POFF
POWER
SUPPLY
MPCA8
INT0
CPU CKDC9
L
STOP L
RESET
(System reset)
CPU CKDC9
RESET
(System reset)
Power supply Off
10ms MIN
8 PULSE
Flow chart
Star t
CKDC start
condition read
Hard reset
start?
Yes
*Slide Switch
operation
MRS1 key
ON?
Yes
PASSWORD
judgement
OK?
Yes
MRS reset
L
14. Drawer
The ER-A770 can use up to 2 optional external drawers.
14-1. Drawer solenoid drive
H
P34 P37 inside the CPU are allocated for the port output of the
drawer solenoid drive.
Built-in port Signal name
P34
P35
P36
P37
One port corresponds to one drawer. Theoretically, it is possible to
drive multiple drawers at the same time, but this processing must be
inhibited softwarewisely because of power supply capacity and driver
hardware factors. If a power failure is detected, the drawer solenoid
drive must be stopped as soon as possible.
The drawer solenoid drive time must controlled in the range of 40
ms to 50 ms by the timer.
14-2. Drawer open/close sense
The drawer open/close sense signal is input into the built-in port of
the CPU. the sense signal of an optional drawer sensor is also wired
ORed before inputting.
P33=1: Any of the drawers is open.
No
No
Normal
start?
Yes
Recovery
No
MRS2 key
ON?
Yes
PASSWORD
judgement
No
No
OK?
SRV reset
Yes
10-key position
input sequence
MRS reset
Fig. 16
Remarks
DR0 Drawer 1 (optional drawer)
DR1 Drawer 2 (optional drawer)
DR2 Reserved
DR3 Reserved
SRV reset
SRV reset