Pioneer XC-L77 Service Manual page 50

XC-L77
* Port C can bitting select I/O. The input after resets.
* Port D can select I/O only by (PDO-3, PD4-7) every four bits. The input after resets.
¢ PF4-7 of port F can bitting select I/O. The input after resets.
* Port I can bitting select I/O. The input after resets.
¢ Port J can bitting select I/O. The input after resets.
+ PE6 Attention concerning PE7. Adjust to 0.7V or more both PE6 and PE7 when RST standing up from L to H.
Please note entering in the test mode of the microcomputer. Pull-up is necessary.
¢ When resetting : Makes to Hi-Z excluding PE6 and PE7. PE6 and PE7 are made H level.
* Connect the 90th terminals NC with Vdd.
* Connect both of the terminal Vss of the 41th pin and the 88th pin with GND.
* It is terminal OPEN and OK for the model without RDS.
RDSDATA is set to make to the output mode and to output LOW with the microcomputer.
¢ The processing such as pull-down is necessary for RDSCLK for the model without RDS.
*1 : Change of function. The truth value table of BU4052BCF.
[A [8 | Switch tumedon | Function]
i NJU7002M (CONTROL UNIT : IC5902) i TDA7294V (AMP UNIT : 1C3303)
¢ OP-AMP IC ¢ DMOS Audio Amplifier IC
e Pin Function @ Pin Assignment
-Vs (POWER)
+Vs (POWER)
N.C.
N.C.
MUTE
STAND-BY
-Vs (SIGNAL)
+Vs (SIGNAL)
BOOTSTRAP
N.C.
SUR
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND
® Block Diagram
iN-
IN+ (14) OUT
BOOTSTRAP
IN+MUTE (4) ©)
MUTE (10)
STBY (9)
STBY-GND -Vs -PWVs
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