— 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 ~ 4 – 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 ~ 7, 12 In Address bus
11 ~ 13 I/O 0 ~ 2 In/Out Data bus
14 GND In GND / 0[V]
15 ~ 19 I/O 3 ~ 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, 9, 11 In Address bus
26 CE2 In Chip enable signal
27 WE In Write enable signal
28 VCC In Power supply / 3[V]
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