Sony CDX-GT878US - Page 36

CDX-GT828U/GT870US/GT878US
36
KEY BOARD IC901 M30876FJBA04GP (FL DRIVER, LED CONTROL, FLASH MEMORY CONTROL)
Pin No. Pin Name I/O Description
1 SYS_CE I Main chip enable signal input
2 NC O Not used. (Open)
3 FL_DATA3 O FL serial data signal output 3
4 NC O Not used. (Open)
5 FL_CLK_IN I FL serial clock signal input
6 BYTE I Connect to VSS. (Fixed at L)
7 CNVSS I Flash writer signal input (L: normally operation, H: writer mode)
8, 9 NC O Not used. (Open)
10 RESET I Reset signal input
11 XOUT O Main-clock signal output (6.75 MHz)
12 VSS ― Ground
13 XIN I Main-clock signal input (6.75 MHz)
14 VCC1 ― Power supply pin (+3.3 V)
15 NMI I Nonmaskable interruption signal input (Fixed at H)
16 to 18 NC O Not used. (Open)
19 GCP_TA4_IN I FL GCP signal input
20, 21 NC O Not used. (Open)
22 BK_TA3_OUT O FL BK signal output
23 NC O Not used. (Open)
24 LAT_TA2_OUT O FL latch signal output
25 LAUNG I
Foreign language font display mode with/without setting signal input (L: without foreign
language font display mode (CDX-GT828U/GT870US), H: with foreign language font display
mode (CDX-GT878US))
26 BLINK O Blink control signal output
27 NC O Not used. (Open)
28 GCP_TA0_OUT O FL GCP signal output
29 SYS_SO O Serial data signal output
30 SYS_SI I Serial data signal input
31 SYS_CLK I Serial clock signal input
32 NC O Not used. (Open)
33 FL_DATA1 O FL serial data signal output 1
34 NC O Not used. (Open)
35 FL_CLK I FL serial clock signal input
36 NC O Not used. (Open)
37 RDY I External data bus (RDY) signal input (Fixed at H) (CDX-GT878US only)
38 ALE O Not used. (Open)
39 HOLD I External data bus (HOLD) signal input (L: CDX-GT828U/GT870US, H: CDX-GT878US)
40 HLAD O Not used. (Open)
41 BCLK O Not used. (Open)
42 RD O External data bus (RD) signal output (CDX-GT878US only)
43 WRH/BHE O Not used. (Open)
44 WRL/WR I External data bus (WRL/WR) signal input (L: CDX-GT828U/GT870US, H: CDX-GT878US)
45 CS3 O Not used. (Open)
46 CS2 O Not used. (Open)
47 CE O External data bus (CE) signal output (CDX-GT878US only)
48 A19 I/O External data bus (A19) signal input/output (CDX-GT878US only)
49 A18 I/O External data bus (A18) signal input/output (CDX-GT878US only)
50 A17 I/O External data bus (A17) signal input/output (CDX-GT878US only)
51 A16 I/O External data bus (A16) signal input/output (CDX-GT878US only)
52 A15 I/O External data bus (A15) signal input/output (CDX-GT878US only)
53 A14 I/O External data bus (A14) signal input/output (CDX-GT878US only)
54 A13 I/O External data bus (A13) signal input/output (CDX-GT878US only)
55 A12 I/O External data bus (A12) signal input/output (CDX-GT878US only)
56 A11 I/O External data bus (A11) signal input/output (CDX-GT878US only)
57 A10 I/O External data bus (A10) signal input/output (CDX-GT878US only)