Kenwood KDC-MP638U Service Manual page 8

KDC-MP638U/W7041U
/W7141UY/X692/X7009U
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin No. Pin Name
64 MUTE_2
65 LINE_MUTE
66 NC (SA_IN)
67 NC (SA_RST)
68 NC (SA_CLK)
69 NC (MUTE_SA)
70 PWIC_DC_DET
71 ACC_DET
72 BU_DET
73 LX_REQ_S
74 MUTE_AFS
74 NC
75 SDA/EVOL_SDA
75 SDA/E2P_SDA
76 SCL/EVOL_SCL
76 SCL/E2P_SCL
77 PWIC_MUTE
78 PWIC_STBY
79 LX_REQ_M
80 LX_MUTE
81 LX_CON
82 LX_RST
83 MUTE_PRE_FR
84 MUTE_PRE_SW
85 PON_AM
86 TUN_IFC_OUT
87 TUN_SMETER
88 RDS_NOISE
88 NC
89 RDS_AFS_M
89 NC
90 TYPE_1
91 TYPE_2
92 G_Y_OUT
92 NC
8
I/O Application
O IC-2 SW MUTE control
I Line mute detection
O Not used
O Not used
O Not used
O Not used
I DC offset detection terminal
I ACC detection
I BU detection
I Communication request from slave unit
IC-2 MUTE_C control
I/O
AFS MUTE
I Not used (For other type than E-TYPE)
I/O System μ-com → IC-2 data output
I/O I2C data for ROM correction
I/O System μ-com → IC-2 CLK output
I/O I2C clock for ROM correction
O Power IC MUTE terminal
O Power IC standby terminal
O Communication request to slave unit
I MUTE request from slave unit
O Start-up request to slave unit
O Hardware-reset to slave unit
O External PREOUT_MUTE F/R
External PREOUT_MUTE SUB
O
MUTE_2 shock noise measure
I/O AM+B power supply control terminal
I F/E IFC OUT input terminal
I S meter voltage detection terminal
I FM noise voltage detection terminal
O Not used. (In models without RDS)
I/O Time constant switching when noise is detected
O Not used. (In models without RDS)
I A/D 5 pattern
I A/D 5 pattern
I Detection of Y direction movement of G analyzer
O Not used. (In models without G antenna)
Truth
Processing / Operation / Description
Value Table
L: Mute ON, Independent setup of time
constant 10ms, H: In normal condition
Shall be used together with MUTE_PRE_SW
IC2 shock noise measure
TEL MUTE: 1V or less, NAVI MUTE: 2.5V or higher
Output L fi xed
Output L fi xed
Output L fi xed
Output L fi xed
L: ACC found, H: ACC not found
L: BU found, H: When No BU
Reduction of power, and Over voltage
L: Mute ON, Independent setup of time
constant 0.5ms, Hi-Z: While in normal
Input Hi-Z fi xed
Communication speed 200-400k
Communication speed 200-400k
Communication speed 200-400k
Communication speed 200-400k
L: While STANDBY source, momentary power
down, L: While TEL MUTE
POWER ON: H, POWER OFF: L
H: Mute ON, L: Mute OFF
H: Slave unit ON, L: Slave unit OFF
H: RST, L: Normal
"L" when Obit, or momentary power down
"L" when Obit, or momentary power down
Shall be used in addition to MUTE_2.
H: ON when AM is being received.
Hi-z: OFF in other condition.
H: Station is found., L: No station is found.
Output L fi xed
e L: During AF search, Hi-Z: In normal condition
Output L fi xed
q
q
Output L fi xed