Service manual

67
HCD-GNZ55D
Pin No. Pin Name I/O Pin Description
49 WIDE I Wide signal output Not used in this set. (Open)
50 MSW O Volume control signal output
51 MAMUTE O MAMUTE signal output to System Controller Not used in this set. (Open)
52 DVDD18 — Power Supply pin (+1.8 V)
53 to 58 IOA 2 to 7 O Address bus 2 to 7 output to PROM
59 HIGHA0 O Address bus 8 output to PROM
60, 61 IOA18, 19 O Address bus 18, 19 output to PROM
62 DVSS — Ground pin
63 APLLCAP I APLL External Capacitance connection
64 APLLVSS — Ground pin
65 VDD3 — Power Supply pin (+3.3 V)
66 IOWA O WE signal output to PROM
67 A16 O Address bus 16 output to PROM
68 to 72 HIGHA 7 to 3 O Address bus 15 to 11 output to PROM
73 DVDD3 — Power Supply pin (+3.3 V)
74, 75 HIGHA 2, 1 O Address bus 10, 9 output to PROM
76 IOA20 O Address bus 20 output to PROM
77 IOCS O CE signal output to PROM
78 IOA1 O Address bus 1 output to PROM
79 IOOE O OE signal output to PROM
80 DVDD3 — Power Supply pin (+3.3 V)
81 to 84 AD 0 to 3 I Data bus 0 to 3 input from PROM
85 DVSS — Ground pin
86 to 88 AD 4 to 6 I Data bus 4 to 6 input from PROM
89 IOA21 O Address bus 21 output to PROM
90 ALE O Address latch enable Not used in this set. (Open)
91 AD7 I Data bus 7 input from PROM
92 A17 O Address bus 17 output to PROM
93 IOA0 O Address bus 0 output to PROM
94 DVSS — Ground pin
95 UWA I System Controller write strobe Not used in this set. (Open)
96 URD I System Controller read strobe Not used in this set. (Open)
97 DVDD18 — Power Supply pin (+1.8 V)
98 IFSDO I DVD SDO signal input from System Controller
99 IFCK O DVD SCO signal output to System Controller
100 XIFCS I DVD XIFCS signal input from System Controller
101 IFSDI I VIFBUSY signal output from System Controller
102 SCL O SCL signal output to EEPROM
103 SDA O SDA signal output to EEPROM
104 TRG-SW O RS232 RXD signal output Not used in this set. (Open)
105 IFBSY I RS232 TXD signal input from System Controller
106 RXD I RD232 RXD clock
107 TXD I RD232 TXD data
108 DVDD3 — Power Supply pin (+3.3 V)
109 ICE I ICE mode enable Not used in this set. (Open)
110 PRST I MTRST signal input from System Controller
111 IR I IR control signal input Not used in this set. (Open)
112 INT0 I External interrupt 0 Not used in this set. (Open)
113 DQMO O DQMO signal output to SD-RAM
114 MREQ I DQM signal input
115 RD7 I Data bus 7 from SD-RAM
116 DVSS — Ground pin
117, 118 RD 6, 5 I Data bus 6, 5 from SD-RAM