Sony SPP-A2770 Service Manual page 45

Pin No. Pin Name
DIS CHG
48
(WAKE UP)
49 WDT
50 WAKE UP
BATT POWER
51
FAIL
52 SS IRQ
53 RESET
54 XT1
55 XT2
56 VSS1
57 CF1
58 CF2
59 VDD1
60 AN0
61 CHARGE DET
62 AN2
63 SS SPI DOUT
64 SS SPI DIN
I/O
O Wakeup control signal output "L" output when discharge
I Watch dog timer reset signal input terminal
I Wakeup control signal input "H": wakeup
I Battery power fail detection signal input
I Interrupt request signal input from the RF unit (RF61)
System reset signal input from the reset signal generator (IC123) "L": reset
I
For several hundreds msec. after the power supply rises, "L": is input, then it changes to "H"
I Sub system clock input terminal (32.768 kHz) Not used (fixed at "H")
O Sub system clock output terminal (32.768 kHz) Not used (open)
— Ground terminal
I Main system clock input terminal (6 MHz)
O Main system clock output terminal (6 MHz)
— Power supply terminal (+3.3V)
I Not used (open)
I Charge detection signal input "L": charge on
I Not used (open)
O Serial data output to the RF unit (RF61)
I Serial data input from the RF unit (RF61)
Description
"H": reset Not used (fixed at "L")
"L": battery power fail
"L" active
SPP-A2770
45