Microcomputer's Terminal Description - Kenwood Z910DVD Service Manual

MICROCOMPUTER'S TERMINAL DESCRIPTION

Pin Name
48 P36/NSTDMA NO_USE
49 P37/NDKDMA NO_USE
50 P40/KEY0 TYPE0
51 P41/KEY1 TYPE1
52 P42/KEY2 ST-TYPE0
53 P43/KEY3 ST-TYPE1
54 P44/KEY4 RE-TYPE0
55 P45/KEY5 RE-TYPE1
56 P46/KEY6 DSP-CON
57 P47/KEY7 DSP-REQH
58 P50/NWE DSP-RST
59 P51/NRE CH-RST
60 P52/NCS CH-MUTE
61 P53/A16 CH-CON
62 P54/A17 CH-REQH
63 P60/A0 NO_USE
64 P61/A1 DVD/CH-SELECT
65 P62/A2 DVD-+B
66 P63/A3 P-ON
67 P64/A4 P-MUTE
68 P65/A5 SVR
69 P66/A6 STBY
70 P67/A7 MODE0
71 P70/A8 MUTE
72 P71/A9 EVOL-CLK
73 P72/A10 EVOL-DATA
74 P73/A11 SPATIALIZER
75 P74/A12 MODE1
76 P75/A13 DVD-ATN-FM
77 P76/A14 DVD-RDY-FM
78 P77/A15 DVD-RST
79 P80/D0/LED0 PLL-CLK
80 P81/D1/LED1 PLL-DATA
81 P82/D2/LED2 FM+B
82 P83/D3/LED3 AM+B
83 P84/D4/LED4 AFC
84 P85/D5/LED5 IFC
85 P86/D6/LED6 D-MUTE
86 P87/D7/LED7 PRE-MUTE
87 PD0/SDO0 RDS-QUAL
88 PD1/SDO1 RDS-DATA
89 PD2/SDO2 LED_SW
90 PD3/SDO3 EJECT
91 PD4/SDO4 PN-MC-REQ/PN-DET
92 PD5/SDO5 PN-RST
Signal Name I/O
O Open
O Open
I Destination type selection input
I Destination type selection input
I EVOL control selection input
I EVOL control selection input
I Region code selection input
I Region code selection input
O DSP control output
O REQ output to DSP
O Reset output to DSP
O Reset output to CD-CH
I Muting signal input from CD-CH
O CD-CH control output
O REQ output to CD-CH
O Open
O DVD/CD-CH audio selection output
O DVD power ON/OFF control output
O Internal power control output
O Muting output to internal amp
O Ripple discharge circuit control output
O Internal amp standby control output
O Surround mode switching output
O Muting output
O Clock output to EVOL
I/O Data output to EVOL
O Spatializer ON/OFF control output
O Surround mode switching output
O ATN output to DVD uCOM
O Ready output to DVD uCOM
O Reset output to DVD uCOM
O Clock output to front end
I/O Data output to front end
O FM power control
O AM power control
O Output for time constant switching
when noise is detected
I IFC input from F/E
I Muting input from DVD uCOM
O Dual zone muting output
I QUAL input from RDS
I Data input from RDS
O Illumination output to subpanel
(EJECT_ button and disc insertion slot)
I EJECT switch input
I/O REQ output to Panel uCOM/Panel
release detection input
O Reset output to panel uCOM
Purpose
Refer to the Destination Type Setting Table.
Refer to the Destination Type Setting Table.
Refer to the Destination Type Setting Table.
Refer to the Destination Type Setting Table.
Refer to the Destination Type Setting Table.
Refer to the Destination Type Setting Table.
Hi : DSP = ON
Hi : RESET
Hi : RESET
Hi : MUTE
Hi : CD-CH = ON
Hi : DVD. Lo : CD-CH. Switched during muting.
Hi : DVD power ON.
Hi : Power ON.
Lo : Muting ON. Lo is output in momentary power down.
Hi : Discharged.
Hi : Standby OFF (Power ON). Set
preliminarily to the same timing as P_ON.
Refer to the Destination Type Setting Table.
Hi : MUTE = ON
Hi : SPATIALIZER = ON
Refer to the Destination Type Setting Table.
Lo : RESET
Hi : FM power ON.
Hi : AM power ON.
Hi : Larger time constant (during reception).
Lo : Smaller time constant (during AF search).
Lo : MUTE = ON
Hi : Lamp ON.
Lo : EJECT_SW ON.
Output : Communicating with panel
uCOM. Input : Lo when panel is detected.
Lo : Reset.
Z910DVD
Processing/Operation
5