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20
OFF
ao H GPU judge
voc
vDD
STOP
SRES
i) When the host GPU recognizes the power down signal, the reset
request signal STOP (H — L) is issued to the CKDCIII after
completing a series of power down procedure like saving memory
contents and address.
When the CKDCILI recognizes the STOP signal (H - L), the
reset signal SRES (H — L) is issued to the host CPU to go into
the standby mode,
In the standby made, the clock and calendar data are updated
and wait for the power recovery signal,
ii) When the power supply resumes, the P-OFF signal is set high.
When the CKDCIII recognizes the power restoration, the SRES
signal is set high and cancels the reset state of the host CPU,
and the program is resumed to run. After the host CPU sets VO
mode to ports, it then starts to execute the program immediately
power was down,
2-7, Battery circuit
O.1p 19W6V
4704
A
] 16V
I
———_+
: Battery charge current
—-»
: Battery discharge current
Fig. 2-9
2-8. Display control
The CKDCIH has an internal driver to directly drive the fluorescent
display tibe through the output line.
veKDC
4
P-ch open drain
LH
ckocHy
100k
a
vDISP
rt
Fig. 2-10.
The above figure is an example of the grid driver Gn. The segment
driver has same circuit configuration.
The display tube employs a grid blanking dynamic drive and
operates in the following timing.
778pS xn
778)
1
Gm
oP,v
SA,SB,SC,SD
'SE,SF,SG
JTL
Gm+t
£5 —
Fig. 2-11
Printer control
BA12003X4
fso-par, Peo, PBL}
Tai ~ t0
cpu
Pri
Magnet | pai -PaTo | CHB T2A
ener
UCRB12A
Motor driver
Driver,
Fig. 2-12
IMi ~ JM10
Journal magnet select signal
'RM ~ RM16
Receipt magnet select signal
TF
Journal feed signal
RF
Receipt feed signal
STAMP
Stamp signal
a
Printer interface signal
VM
Motor drive signal
R-COM
Receipt common signal
J-COM
Journal common signal
Printer motor drive circuit
BLOCK diagram
'TR B1005
Printer
motor
PB7
Fig. 2-13
A high on PB7 makes TR3 active and TR4 inactive so that current
lon flows through the motor to run. On the other hand, a low on PB7
tums off TR3 and turns on TR4 so that iofi flows through the motor
to stop the motor.
ao
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