— 16 —
Pin No.
Signal
In/Out
Function
237
VDB
In
Low battery detection
4.4[V] < VDB < 5.2[V]
⇒
Low battery message
238, 239
VREG1, 4
–
VREG1:
2.6 [V]
VREG4:
5.0 [V]
240 ~ 243
VT1 ~ VT4
–
VT1 : 1.0[V]
VT2 : 2.9[V]
VT3 : 2.0[V]
VT4 : 3.9[V]
244
VLCD
Out
5.9 [V]
2.
RAM (LC3564QM-85)
Pin No.
Signal
In/Out
Function
1
NC
–
No connect
2 ~ 10
A0~A7, A12
In
Address bus
11 ~ 13
I/O 0 ~ I/O 2
In/Out
Data bus
14
GND
In
GND / 0[V]
15 ~ 19
I/O 3 ~ I/O 7
In/Out
Data bus
20
CE
In
Chip enable signal
21
A10
In
Address bus
22
OE
In
Output enable signal
23 ~ 25
A8, A9, A11
In
Address bus
26
CE2
In
Chip enable signal
27
WE
In
Write enable signal
28
VCC
In
Power supply / 3[V]
