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3. TECHNICAL BRIEF
D. SIM Interface
The AD6525 check status periodically in call mode if SIM card is inserted or not, but the AD6525 don't
check in deep sleep mode.
Interface signals are SIM_DATAOP, SIM_CLK, SIM_RST, SIM_EN
SIM_DATAOP
SIM_CLK
SIM_RST
SIM_EN
E. Key Interface
Key Interface includes 5 column (KEYCOL[0:4]) and 5 row (KEYROW[0:4]). AD6525
detects key press by interrupt.
F. ADP3522(PMIC, U202) Interface
There are 4 signals for PMIC (power management IC) interface.
CHRDET
CHG_EN
EOC
GATE_EN
Table 3-5 SIM interface
Description
This pin receives and sends data to SIM card. This model
support 3.0 volt interface SIM card.
Clock 3.25 MHz frequency.
Reset SIM Block
Enable SIM Block
Table 3-6 PMIC interface
Description
The pin is activated when charger is inserted.
Enable charging
The pin is activated by PMIC when VBAT reaches 4.2V.
Control signal from AD6525 to charge NiMH battery. Not used.
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