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10
FZDA07ELEF2/EREF2/MRHF2
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SWITCH UNIT (X34-405x-xx) (H/C)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
Heater control panel µ-com
Vehicle ECU, communication with audio-side µ-com, key import, display
data transmission, illumination control
IC2
Reset IC
When µ-com power supply voltage is 4.2V or less, reset the µ-com.
IC3
E2PROM
Stores ROM correction data
Q1
UART+
Interface for UART communication (transmission) with vehicle.
Q2
UART-
Interface for UART communication (reception) with vehicle.
Q3
Power switch
ON/OFF VH voltage application of VFD.
Q4
Power switch
ON/OFF Q3 by taking IGN_DET and DD_ON logic.
Q5
ILL- signal detection
Transmit ILL- signal from vehicle to µ-com and Q13.
Q7
ACC voltage detection
Detects ACC voltage from the vehicle.
Q11
Illumination LED control switch
Controls ON/OFF and the luminance of LED for front DEF.
Q12
Illumination LED control switch
Controls ON/OFF and the luminance of LED for rear DEF.
Q13
Illumination LED control switch
Controls ON/OFF and the luminance of LED for key illumination.
●
ELECTRIC UNIT (X34-485x-xx)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC2
Video switching SW for navigation
P-ON5V drive
IC4
CAN driver
P-ON5V drive for CAN-BUS communication with the vehicle
IC6
BUS driver for ETC communication (Only for J-type)
P-ON5V drive
IC7
System µ-com
Pins from #1~#47 and from #123~#144 are 5V-driven and pins from
#48~#122 are 3.3V-driven
IC201
TV8V power supply IC
Input: SW_BU, Output when TV5V is ON
IC261
DVD_A5V power supply IC
Input: SW8V, Output when SW8V is being applied
IC281
N_A5V power supply IC
Input: SW8V, Output when SW8V is being applied
IC300
Amplifi er for sound recognition microphone
P-ON8V drive
IC304
6dB video amplifi er for navigation video and RSE video
75
Ω
drive, P-ON5V drive
IC305
BUS-driver for TMC communication
P-ON5V drive
IC307
Buffer for audio reference voltage
4V output, P-ON8V drive
IC310
BU5V power supply monitor
Output Lo (Reset) when BU5V is less than 4.3V
IC313
E2PROM (P-ON period of time, TILT correction value,
number of DVD_EJECT)
1kbit, I2C-BUS, BU5V drive
IC314
Video switching SW for RSE output
P-ON5V drive
IC315
For SECURITY communication level conversion
P-ON3.3V drive
IC321
N_BU3.3V power supply IC
Input: N_BTT, Output when N_BTT is being applied
IC361
REAR6V power supply IC
Input: SW8V, Output when SW8V is being applied
IC501
P-ON5V and P-ON3.3V generation switching regulator (250k~550kHz), 3.3V: 5A, 5V: 5A, BU drive
IC601
P-ON8V generation switching regulator
250kHz, 8V: 2.2A, BU drive
IC603
Buffer for DC/DC CLK and navigation CLK
P-ON3.3V drive
IC605
Watch dog monitor
Output Lo (Reset) when the smoothed voltage of the watch dog pulse is
2.5V or less
IC606
Buffer for SPDIF
P-ON3.3V drive
COMPONENTS DESCRIPTION