Kenwood KVT-910DVD Service Manual page 24

KVT-910DVD/920DVD/930DVD/
940DVD/960DVD
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin Name
43 RD
44 N.C.
45 SH_VMUTE
46 NTSC_PAL
47 WRH
48 WRL
49 CS1
50 CS0
51 N.C.
52 N.C.
53 CS3
54 CS2
55 Vss
56 N.C.
57 N.C.
58 N.C.
59 DACK
60 N.C.
61 Vss
62 DREQ
63 Vcc
64 N.C.
65 N.C.
66 N.C.
67 N.C.
68 N.C.
69 SYSCS
70 IRL
71 Vss
72 SHCON
73 D15
74 D14
75 D13
76 D12
77 Vcc
78 D11
79 Vss
80 D10
81 D9
82 D8
83 D7
84 D6
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I/O Function
O External device read out strobe
O Not used
O Image mute terminal
O NTSC{|PAL switching terminal
O External device high position write strobe
O External device low position write strobe
O Chip selection1 (Q2 internal register)
O Chip selection0 (ROM)
O Not used
O Not used
O Chip selection3 (SRAM)
O Chip selection2 (VRAM)
I GND
O Not used
O Not used
O Not used
O DMA transfer strobe for Q2 (Not used)
O Not used
I GND
I DMA transfer request from Q2 (Not used)
I 5V Power source
O Not used
O Not used
O Not used
O Not used
O Not used
I Transmission request signal from system micom L: Transmission request
I Interrupt request form Q2
I GND
I Graphic micom control terminal
I/O Data bus
I/O Data bus
I/O Data bus
I/O Data bus
I 5V Power source
I/O Data bus
I GND
I/O Data bus
I/O Data bus
I/O Data bus
I/O Data bus
I/O Data bus
Description of Processing
H: Image mute ON
H: NTSC L: PAL/SECAM
L: Chip selection
L: Chip selection
L: Chip selection
L: Chip selection
Connect to system micom SW5V
L: Interrupt request
L: Graphic micom standby
Connect to system micom SW5V