Read Sharp XE-A303 (serv.man4) Service Manual online
XE-A303 (V)
HARDWARE DESCRIPTION
– 9 –
4-2. XE-A303V PORT
●●●●● ●●
pending
< Model Judgment >
The model is judged when starting the internal ROM.
< External Area Control >
For details, refer to the address map.
< Key Strobe >
< Key Return >
< LCD Control >
< USB Control >
5. DISPLAY OUTPUT/KEY INPUT
This unit is provided with the POPUP display of 7 digit and 7 segment
LED and the front display of 5
LED and the front display of 5
u
7 dot, 16-digit
u
2 lines.
The front display is the LCD with the LCD controller same as those
used in the conventional XE-A401 series. Its connector pin arrangement
was partially changed along with 2 color back light.
was partially changed along with 2 color back light.
< Key Strobe >
< Key Return >
5-1. POPUP DISPLAY/KEY
< POPUP/KEY MAP >
PIN No. CPU PORT SIGNAL NAME
FUNCTION
123
P104
P104
I
BE USED TO MODEL
JUDGMENT
H : XE-A303V
JUDGMENT
H : XE-A303V
PIN No. CPU PORT SIGNAL NAME
FUNCTION
59
P52/#RD
#RD
O
READ SIGNAL
61
P53/#WR
#WR
O
WRITE SIGNAL
62
P127
RAMBANK
O
RAMBANK SIGNAL
63
P126
ROMBANK
O
ROMBANK SIGNAL
64
P125
FRDY
I
FLASH-ROM RDY/BUSY
SIGNAL INPUT
SIGNAL INPUT
65
P47
#CS3
O
66
P46
#CS2
O
67
P45
#CS1
O
68
P44
#CS0
O
PIN No.
PORT
SIGNAL NAME
FUNCTION
84
P120
KST0
KEY STROBE SIGNAL 0
83
P121
KST1
KEY STROBE SIGNAL 1
82
P122
KST2
KEY STROBE SIGNAL 2
81
P123
KST3
KEY STROBE SIGNAL 3
PIN No.
PORT
SIGNAL NAME
FUNCTION
10
P90
KR0
KEY RETURN SIGNAL 0
9
P91
KR1
KEY RETURN SIGNAL 1
8
P92
KR2
KEY RETURN SIGNAL 2
7
P93
KR3
KEY RETURN SIGNAL 3
6
P94
KR4
KEY RETURN SIGNAL 4
5
P95
KR5
KEY RETURN SIGNAL 5
4
P96
KR6
KEY RETURN SIGNAL 6
3
P97
KR7
KEY RETURN SIGNAL 7
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
FUNCTION
R/W
ADDRESS
POPUP Display
7segment
u
7 LED
W
04000H CS3 AREA
Front Display
LCD M398
R/W
04001H CS3 AREA
*
R is 0400h under the
present situation.
present situation.
PIN No.
PORT
SIGNAL NAME
FUNCTION
84
P120
KST0
KEY STROBE SIGNAL 0
83
P121
KST1
KEY STROBE SIGNAL 1
82
P122
KST2
KEY STROBE SIGNAL 2
81
P123
KST3
KEY STROBE SIGNAL 3
PIN No.
PORT
SIGNAL NAME
FUNCTION
10
P90
KR0
KEY RETURN SIGNAL 0
9
P91
KR1
KEY RETURN SIGNAL 1
8
P92
KR2
KEY RETURN SIGNAL 2
7
P93
KR3
KEY RETURN SIGNAL 3
6
P94
KR4
KEY RETURN SIGNAL 4
5
P95
KR5
KEY RETURN SIGNAL 5
4
P96
KR6
KEY RETURN SIGNAL 6
3
P97
KR7
KEY RETURN SIGNAL 7
S0#~S9#
HC
138
138
KS0~KS3
POPUP Display 7digit
Keyboard / MODE SW
MATRIX
S0#~S7#
HCT
273
273
D0~D7
a
㨪
g, dp
/CS0 04000h
KR0~KR7
CPU
MODR
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