Sony SPP-A946, Руководство по обслуживанию

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Pin No. Pin Name I/O Description
48 MGS O Microphone output from the internal operational amplifier
49 VREF O Reference voltage output terminal
50 PLLGND — Ground terminal (for PLL)
51 PLLVCC — Power supply terminal (+5V) (for PLL)
52 PLLVCC — Power supply terminal (+5V) (for PLL)
53
XOUT
O System clock output terminal (4.081408 MHz)
54
XIN
I System clock input terminal (4.081408 MHz)
55 DGND — Ground terminal (for digital)
56 RESET I
System reset signal input from the reset signal generator (IC206) or watch dog timer (IC204)
“L”: reset For several hundreds msec. after the power supply rises, “L” is input, then it changes
to “H”
57
PDN
I Power done detect signal input from the XC612N4540MR (IC206) “L”: power down
58 CS O Chip select signal output to the flash memory (IC203)
59 P DTMF
O
Busy signal output terminal “L”: in the midst output DTMF Not used (open)
60 REC MUTE
O
Line output from LINE OUT (pin eh ) muting control signal output
“L”: in the midst recording
61 ALE O Address latch enable signal output to the flash memory (IC203)
62
CLE O
Command latch enable signal output to the flash memory (IC203)
63 to 70 COL0 to COL7
I
Key return signal input from the key matrix
71 to 73
ROW0 to ROW2
O Key send signal output to the key matrix
74 DGND — Ground terminal (for digital)
75 DVCC — Power supply terminal (+5V) (for digital)
76 ROW3 O Key send signal output to the key matrix
77 KEY OUT1 O
Key on signal output of INTERCOM key (S207) is pressed to the system controller (IC8)
“H”: key on
78 KEY OUT2
O
Key on signal output of SPEAKERPHONE key (S232) is pressed to the system controller (IC8)
“H”: key on
79 THOOK O
Status signal output to the system controller (IC8)
“L”: in the midst automatic response or line remote
80
NC
— Not used (open)
81
WP
O Write protect signal output to the flash memory (IC203) “L”: protect
82, 83 NC — Not used (open)
84 to 91
D7 to D0 I/O
Two-way data bus with the flash memory (IC203)
92 DGND — Ground terminal (for digital)
93 DVCC — Power supply terminal (+5V) (for digital)
94
RE
O Reed enable signal output to the flash memory (IC203)
95
WE
O Write enable signal output to the flash memory (IC203)
96 MAIL1 LED O LED drive signal output of the MAIL BOX1 indicator (D213) “L”: LED on
97
MAIL2 LED
O LED drive signal output of the MAIL BOX2 indicator (D214) “L”: LED on
98
MAIL3 LED
O LED drive signal output of the MAIL BOX3 indicator (D215) “L”: LED on
99 ANS LED O LED drive signal output of the ANSWER ON/OFF indicator (D216) “L”: LED on
100
NC
— Not used (open)