Read Sharp XE-A303 (serv.man4) Service Manual online
XE-A303 (V)
HARDWARE DESCRIPTION
– 10 –
LED DIGIT signal
The above S0#~S6# are made as the LED DIGIT signal.
S0#: First digit~S6#: 7th digit
LED Segment signal
By writing the segment data to 04000h, the LED segment signal can be
outputted.
outputted.
POPUP Display/KEY SCAN timing
POPUP Display/KEY SCAN and KEY DATA Read are made in the fol-
lowing timing:
1
POPUP Display/KEY SCAN frequency: 10ms
2
Blanking time: 50us
3
KEY DATA READ timing: Read 10us~100us before Strobe signal
OFF.
< LED Segment Signal Write >
< POPUP Display >
5-2. FRONT DISPLAY
The front display is the LCD with the LCD controller which is similar to
those used in the conventional XE-A401 series.
those used in the conventional XE-A401 series.
The back light is provided with Yellow, Green, and Orange as conven-
tionally provided.
< CPU PORT >
< Front Display >
6. USB PORT
One port for USB Port (Slave) is provided as a standard provision. The
Renesus-make USB general-use ASSP device M66291 is used. The
M66291 is mapped to the /CS1 area 28000h-30000h.
M66291 is mapped to the /CS1 area 28000h-30000h.
For reset from hung-up of the M66291, the CPU controls the port.
< CPU PORT >
*
For the input clock, 24MHz CSTCW24MOX11xxx-RD made by
Murata Manufacturing is employed.
Murata Manufacturing is employed.
*
Since the functions of P83/#INT1 are not used, it does not function as
an interruption port.
7. PRINTER CONTROL
7-1 STEPPING MOTOR CONTROL
< Stepping Motor Control Signal >
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
04000h
dp
g
f
e
d
c
b
a
PIN No. CPU PORT SIGNAL NAME
FUNCTION
32
P73
LCDCS#
L : LCD WRITE DATA LATCH
SIGNAL
46
P137
LCDE
LCD ENABLE
47
P136
BLON1
BACK LIGHT ON SIGNAL
48
P135
BLON0
BACK LIGHT ON SIGNAL
120
P107
LCDRS
H : DATA INPUT
L : INSTRUCTION INPUT
L : INSTRUCTION INPUT
121
P106
LCDRW
H : DATA READ
L : DATA WRITE
L : DATA WRITE
122
P105
LCDON
LCDON SIGNAL
PIN No. CPU PORT SIGNAL NAME
FUNCTION
23
P84/#INT2
INTUSB#
I
USB CONTROLLER
INTERRUPT SIGNAL
INTERRUPT SIGNAL
24
P83/#INT1
DREQUSB#
I
USB DMA CONTROL
SIGNAL
(FUNCTION UNUSED)
SIGNAL
(FUNCTION UNUSED)
26
P81
RESUSB#
O
USB CONTROLLER
RESET SIGNAL
RESET SIGNAL
PIN No. CPU PORT SIGNAL NAME
FUNCTION
96
P17
I10
PRINTER MOTOR DRIVE
97
P16
I11
PRINTER MOTOR DRIVE
98
P15
PH11
PRINTER MOTOR DRIVE
99
P14
PH12
PRINTER MOTOR DRIVE
100
P13
PH01
PRINTER MOTOR DRIVE
101
P12
PH02
PRINTER MOTOR DRIVE
102
P11
I00
PRINTER MOTOR DRIVE
103
P10
I01
PRINTER MOTOR DRIVE
1
2
27
1.5k
27
3
4
1.0 F
CPU
A0
A1-A6
D0-D7
/CS1
/RD
/WR
/RESUSB
/DREQUSB
/INTUSB
M66291
D15/AD0
AD1-AD6
AD1-AD6
VBuss
D0-D7 TrON
CS
D+
D-
RD
LWR
LWR
Vbus
D+
D+
D-
GND
24MHz
USB
CONN-
ECTOR
CONN-
ECTOR
/RESET
/Dreq0
/INT0
HWR/BYTE
/Dreq0
/INT0
HWR/BYTE
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