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UPD65 Datasheet(PDF) 53 Page - NEC

Part # UPD65
Description  4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
PDF  64 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD65 Datasheet(HTML) 53 Page - NEC

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53
µPD64A, 65
Data Sheet U14380EJ2V0DS00
13. APPLIED CIRCUIT EXAMPLE
Example of Application to System
· Remote-control transmitter (48 keys; mode selection switch accommodated)
Note S2 : Set this pin to disable when releasing STOP mode.
· Remote-control transmitter (56 keys accommodated)
KI/O6
KI/O7
S0
S1/LED
REM
VDD
XOUT
XIN
GND
S2
KI/O5
KI/O4
KI/O3
KI/O2
KI/O1
KI/O0
KI3
KI2
KI1
KI0
Key matrix
8
× 7 = 56 keys
+
+
KI/O6
KI/O7
S0
S1/LED
REM
VDD
XOUT
XIN
GND
S2
Note
KI/O5
KI/O4
KI/O3
KI/O2
KI/O1
KI/O0
KI3
KI2
KI1
KI0
Key matrix
8
× 6 = 48 keys
+
+
Mode select
switch



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