Read Sharp LC-20VM2E (serv.man2) Service Manual online
25
LC-20VM2E
LC-121M2E
LC-150M2E
LC-150M2E
7-3. IC7001 (100pin, QFP) 3D Y/C
Terminal
Symbol
I/O
Level
Buffer Type
Function
No.
PU/PD[k
Ω
]
1, 40,
DGND
-
-
Digital section ground
55,80
45, 64,
DVDD
-
-
Digital section power supply
100
98
MRAS
O
TTL
1mA
RAS output for external EDO memory
(Active Low)
(Active Low)
99
MA8
O
TTL
1mA
Address output for external EDO memory
2-9
MA7-MA0
O
TTL
1mA
Address output for external EDO memory
10
MCAS
O
TTL
1mA
CAS output for external EDO memory
(Active Low)
(Active Low)
11
MWE
O
TTL
1mA
WE output for external EDO memory
(Active Low)
(Active Low)
12
MOE
O
TTL
1mA
OE output for external EDO memory
(Active Low)
(Active Low)
13-28
MIO15-
I/O
TTL Tin-state
1mA/5V
Data input/output for external EDO memory
MIO0
withstand voltage
29
DGND
-
-
fsc generator,digital section ground
30
XI
I
-
fsc generator,reference clock input
(Connect Xtal)
(Connect Xtal)
31
XO
O
-
fsc generator,reference clock reverse output
(Connect Xtal)
(Connect Xtal)
32
DVDD
-
-
fsc generator,digital section power supply
33-36
HO3-HO0
O
TTL Tin-state
1mA
Data output for external field memory
(MSB)-(LSB)
(Open when not used)
37
HWCK
O
TTL Tin-state
3mA
Write clock output for external field memory
(Open when not used)
(Open when not used)
38
HRCK
O
TTL Tin-state
3mA
Read clock output for external field memory
(Open when not used)
(Open when not used)
39
HRST
O
TTL Tin-state
1mA
Reset signal output for external field memory
(Open when not used)
(Open when not used)
41-44
HI3-HI0
I
TTL
5V withstand
Input for external field memory
(MSB)-(LSB)
voltage
(GND connection when not used)
46
AVDD
-
-
fsc generator, DAC section power supply
47
FSCO
-
Analog
fsc generator, fsc output
48
AGND
-
-
fsc generator, DAC section ground
49
AGND
-
-
8fsc-PLL, ground
50
FSCI
-
Analog
8fsc-PLL, fsc input
51
CPLL
-
-
8fsc-PLL, filter output (GND connection)
52
RPLL
I
Schmitt
PU:50
Test input (GND connection)
53
AVDD
-
-
8fsc-PLL section power supply
54
CKMD
I
TTL
5V withstand
CLK8 test mode selection
voltage
(L: Normal, H: Test mode)(GND connection)
PD:50
56
CLK8
O/I
TTL Tin-state
3mA/5V
8fsc clock output
withstand voltage (8fsc clock input in the CLK8 test mode)
57
RSTB
I
Schmitt
5V withstand
System reset input (Active Low)
voltage
(Input of active low reset pulse from external)
PU:50
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