Sony SPP-SS955 Service Manual page 35

QQ
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Pin No. Pin Name
53 RXQP
54 RXQN
55 NC
56 IBIAS
57 AGND
58 BATTERY
59 AFC
60 AGC
61 CALLER-ID
62 PARKP
63 VDDC
64 VSSP
65 SYNDATA
66 SYNTH5MCLK
67 LCDRS
68 LED4
69 JOG (A)
70 JOG (B)
71 SYNCLK
72 SYNSTB
TE 73 VDDP
L 13942296513
74 VSSP
75 SYNEN
76 NVDI
77 NVDO
78 LCDRW
79 TXEN
80 TXPWR1
81 GPIOB6
82 TXRXSEL
83 RINGOFF
84 BASEP
85 TXPWR0
86, 87 GPIOB5, GPIOB0
88 GPIOA7
89 LED1
90 VDDC
91 VSSC
92 LCDPWRP
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93 SLEEP
94 GPIOB4
95 NVCLK
.
96 RESETI
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I/O
I
Receive data (Q positive) input from the RF unit
I
Receive data (Q negative) input from the RF unit
— Not used (open)
I
Analog bias input terminal
—
Analog ground terminal
I
Battery voltage detection input terminal
O Not used (open)
O
Auto gain control signal output to the RF unit
O
Not used (open)
I
Charge detection input terminal "L": charge on
— Power supply terminal (+5V) (for core)
—
Ground terminal (for pad)
O
Synthesizer data output to the RF unit
O
Synthesizer reference oscillator output to the RF unit (9.62 MHz)
Register selection signal output for the liquid crystal display
O
"L": instruction register, "H": data register Not used (open)
O
LED drive signal output terminal "L": LED on Not used (open)
I
Jog dial pulse input of the rotary encoder Not used (open)
I
O
Synthesizer clock signal output to the RF unit
O
Synthesizer strobe signal output to the RF unit
— Power supply terminal (+5V) (for pad)
—
Ground terminal (for pad)
O
Synthesizer power control signal output to the RF unit "H": enable
I/O
Two-way data bus with the EEPROM (IC502)
O Clock signal output to the EEPROM (IC502)
Data read/write selection signal output for the liquid crystal display
O
"L": data write, "H": data read Not used (open)
O
TX system enable signal output to the RF unit "H": enable
O
PA power selection signal output to the RF unit
O
Not used (open)
O TX/RX selection signal output to the RF unit "L": RX, "H": TX
I
RING on/off switch (S501) input terminal "L": ringer off, "H": ringer on
Setting terminal for the base/handset selection
I
"L": base unit, "H": handset unit (CMOS receiver with pull-up)
O
PA power selection signal output to the RF unit
O
Not used (open)
O Muting control signal output for the speaker amplifier "H" active Not used (open)
O
LED drive signal output of the TALK/BATT LOW LED (D501) "L": LED on
—
Power supply terminal (+5V) (for core)
—
Ground terminal (for core)
Power on/off control signal output for the liquid crystal display
O
"L": power on, "H": power off Not used (open)
O Not used (open)
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y
O
Not used (open)
O
i Not used (open)
System reset signal input from the reset signal generator (IC301) "L": reset
I
For several hundreds msec. after the power supply rises, "L" is input, then it changes to "H"
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2 9
8
Function
Q Q
3 6 7 1 3 1 5
co
.
– 47 –
9 4 2 8
0 5 8 2 9 9 4 2 8
m
9 9
9 9