Sharp ER-A520 Service Manual page 14

6-3. DISPLAY
The ER-A520/530 is provided with the LCD display of 5 x 7 dot, 2 line,
16 digit on the FRONT side, and the LED display of 7 digit on the POP
UP side.
FRONT:
POP UP:
• DISPLAY DIGIT SIGNAL
The above ST0~ST6 are DIGIT signals.
ST0:1st digit~ST6:7th digit
• DISPLAY SEGMENT SIGNAL
The LED segment signal can be outputted by writing segment data
to 4000h.
DATA~SEGMENT assignment
D0~D6 3 a~g
3 DP
D7
7. SERIAL I/O
The ER-A520/530 is provided with 2ch RS-232 ports as standard provi-
sion.
Ch1 and Ch2 of RS-232 are assigned to the following CPU ports.
Ch1
Pin No. CPU PORT
42 /RTS1#
41 P65
40 RXD1
39 TxD1
51 P134
50 P135
49 P136
48 P137
Ch2
Pin No. CPU PORT
47 /RTS0#
46 P61
45 RXD0
44 TxD0
61 P130
60 P131
58 P132
56 P133
8. POWER
9. FLASH MEMORY REWRITE PROCEDURE
The FLASH ROM of Fujitsu MBM29F800TA-90 is employed.
No.
67
66
10
9
IPLONO# :"1"; IPL from EP-ROM. Executed from ER ROM.
IPLON1# :"1"; IPL from COM
WP#: Write protect signal of FLASH ROM. "0" write protect. Not used
RY/BY# : Ready/Busy signal from FLASH ROM
Signal to be used IPL from EP-ROM : After setting the IPL SW to ON side, turn on the
RS1#
CI1#
IPL from COM : Data from PC are written into the FLASH ROM through
RD1
SD1
ER1#
10. DRAWER
CD1#
CS1#
The ER-520/530 is provided with 2ch of drawer ports.
DR1#
The drive time of the drawer solenoid is as follows:
Signal to be used
<CPU PORT>
RS2#
No.
CI2#
4
RD2
3
SD2
28
ER2#
CD2#
DRAWER1 : "1", DRAWER 1 OPEN
CS2#
DRAWER2 : "1", DRAWER 2 OPEN
DR2#
DSEN :
ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 13 –
Service interruption should be performed
within 10ms after generation of /POFF.
LM2574 + TR
TRANS.
PQ1CG2032
/POFF detection point
Signal to
CPU PORT
be used
P126 IPLON0 IPL from EP-ROM
P127 IPLON1 IPL from COM
P144 WP# F ROM Write Protect signal
P145 RY/BY# F ROM Ready/Busy signal
in the ER-A520/530.
power to boost the EP-ROM.
the COM port. (Max. 38.4kbps)
50ms (max) 45ms(min)
Signal to
CPU PORT
be used
P93 DRAWER1 DRAWER1 OPEN SIGNAL
P94 DRAWER2 DRAWER2 OPEN SIGNAL
P81 DSEN DRAWER OPEN SIGNAL
"1", DRAWER OPEN
24V
DRAWER
PRINTER
ON/OFF control
(MODE SW)
VLED 5.7V
VCC 5.0V
VDD 5.0V
BATTERY
Function
Function