Sony HCD-DX255 - Page 63

63
HCD-DX155/DX255
Pin No. Pin Name I/O Description
48 DSEL — Not used
49 WIDE I Wide switch signal input tenminal
50 MSW I Mute signal control input
51 MAMUTE O MAMUTE signal output to system controller (IC501) (not used)
52 DVDD18 — Power supply (+1.8V from IC1109)
53 to 58 IOA 2 to 7 O Address bus 2 to 7 output to PROM (IC1102)
59 HIGHA0 O Address bus 8 output to PROM (IC1102)
60, 61 IOA18, 19 O Address bus 18, 19 output to PROM (IC1102)
62 DVSS — Ground terminal
63 APLLCAP I APLL external capacitance connection
64 APLLVSS — Ground terminal
65 VDD3 — Power supply (+3.3V from IC1105)
66 I OWR O WE signal output to PROM (IC1102)
67 A16 O Address bus 16 output to PROM (IC1102)
68 to 72 HIGHA 7 to 3 O Address bus 15 to 11 output to PROM (IC1102)
73 DVDD3 — Power supply (SW+3.3V)
74, 75 HIGHA 2, 1 O Address bus 10, 9 output to PROM (IC1102)
76 IOA20 O Address bus 20 output to PROM (IC1102)
77 IOCS O CE signal output to PROM (IC1102)
78 IOA1 O Address bus 1 output to PROM (IC1102)
79 IOOE O OE signal output to PROM (IC1102)
80 DVDD3 — Power supply (SW+3.3V)
81 to 84 AD 0 to 3 I Data bus 0 to 3 input from PROM (IC1102)
85 DVSS — Ground terminal
86 to 88 AD 4 to 6 I Data bus 4 to 6 input from PROM (IC1102)
89 IOA21 O Address bus 21 output to PROM (IC1102)
90 ALE O Address latch enable (not used)
91 AD7 I Data bus 7 input from PROM (IC1102)
92 A17 O Address bus 17 output to PROM (IC1102)
93 IOA0 O Address bus 0 output to PROM (IC1102)
94 DVSS — Ground terminal
95 UWA I System controller write strobe (not used)
96 URD I System controller read strobe (not used)
97 DVDD18 — Power supply (+1.8V from IC1109)
98 IFSDO O DVD SOD signal input to system controller (IC501)
99 IFCK O DVD SCO signal output to system controller (IC501)
100 XIFCS I DVD XIFCS signal input from system controller (IC501)
101 IFSDI I VIFBUSY signal input from system controller (IC501)
102 SCL O SCL signal output to EEPROM (IC1103)
103 SDA O SDA signal output to EEPROM (IC1103)
104 TRG-SW O RS232 RXD signal output (not used)
105 IFBSY I RS232 TXD signal input from system controller (IC501)
106 RXD I RD232 RXD clock
107 TXD I RD232 TXD data
108 DVDD3 — Power supply (SW+3.3V)
109 ICE I ICE mode enable (not used)
110 PRST I MTRST signal input from system controller (IC501)
111 IR I IR control signal input (not used)
112 INT0 I External interrupt0 (not used)