8
KDC-BT7539U/BT8041U
/BT8141UY/BT838U
MICROCOMPUTER’S TERMINAL DESCRIPTION
Pin No.
Pin Name I/O Application Truth
value table
Processing Operation Description
54 OEM_DISP_CLK I/O External display CLK External display
54 NC O Not used (Models without BT/Models
without OEM_DISP) Output is fixed to L
55 OEM_DISP_CE I/O External display control request External display
55 NC O Not used (Models without BT/Models
without OEM_DISP) Output is fixed to L
56 P_CON I/O PCON control terminal POWER ON: H, POWER OFF: Hi-Z
STBY source: Hi-Z
57 ANT_CON O ANTCON control terminal TUNER source (including while receiving RDS): H
POWER OFF: L, STBY source: L
58 NC O Not used (Models without EXT_AMP) Output is fixed to L
59 ILLUMI_DET I Dimmer illumi detection L: ON, H: OFF
60 VCC2 -
61 MUTE_0 O EVOL FRONT MUTE control L: Mute ON, Independent setup of time constant 10ms,
H: In normal condition
62 VSS -
63 MUTE_1 O EVOL REAR MUTE control L: Mute ON, Independent setup of time constant 10ms,
H: In normal condition
64 MUTE_2 O IC-2 SW MUTE control
L: Mute ON, Independent setup of time constant 10ms,
H: In normal condition, Shall be shared with MUTE_
PRE_SW, IC2 shock noise measure
65 LINE_MUTE I Line mute detection TEL MUTE: 1V or less, NAVI MUTE: 2.5V or more
66 NC O Not used Output is fixed to L
67 BT_RST O BT module reset terminal H: Normal, H: BT reset
67 NC O Not used (Models without BT) Output is fixed to L
68 NC O Not used Output is fixed to L
69 MUTE_SA I/O IC-2 MUTE_A control
Spectrum analyzer MUTE
L: Mute ON, Independent setup of time constant 0.5ms,
Hi-Z: In normal condition
70 PWIC_DC_DET I DC offset detection terminal
71 ACC_DET I ACC detection ACC detected: L, ACC not detected: H
72 BU_DET I BU detection BU detected: L
BU not detected/Reduced voltage/Over-voltage: H
73 LX_REQ_S I Communication request from slave unit
73 NC O Not used (Models not-supporting LX-BUS) Output is fixed to L
74 MUTE_AFS I/O IC-2 MUTE_C control
AFS MUTE
L: Mute ON, Independent setup of time constant 0.5ms,
Hi-Z: In normal condition
74 MUTE_AFS
(Not-used) I Not used Input is fixed to Hi-Z
75 SDA/EVOL_SDA I/O Data output from system μ-com to E.VOL
(System μ-com →E.VOL data output) Communication speed 200-400k
75 PBOOK_SDA I/O Data for BT telephone book memory
75 SDA/E2P_SDA I/O I2C data for ROM correction Communication speed 200-400k
76 SCL/EVOL_SCL I/O Output from system μ-com to EVOLCLK
(System μ-com →EVOLCLK output) Communication speed 200-400k
76 PBOOK_SCL I/O Clock for BT telephone book memory
76 SCL/E2P_SCL I/O I2C clock for ROM correction Communication speed 200-400k
77 PWIC_MUTE O Power IC MUTE terminal
While in STANDBY source, or momentary power down: L
While TEL MUTE: L
78 PWIC_STBY O Power IC standby terminal POWER ON: H, POWER OFF: L
