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UPD62AMC Datasheet(PDF) 18 Page - NEC

Part # UPD62AMC
Description  4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
PDF  62 Pages
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

UPD62AMC Datasheet(HTML) 18 Page - NEC

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18
µPD62A
Data Sheet U14474EJ1V0DS00
3.4 Control Register 1 (P4)
Control register 1 consists of 8 bits. The contents that can be controlled are as shown below.
When reset, this register becomes 0010 0110B.
Table 3-6. Control Register 1 (P4)
Bit
b7
b6
b5
b4
b3
b2
b1
b0
Name
—
—
KI
S0/S1
—S1/LED
KI/O
S0
Pull-down Pull-down
mode
mode
mode
Set
0
Fixed
Fixed
OFF
OFF
Fixed
S1
IN
OFF
value
1
to 0
to 0
ON
ON
to “0”
LED
OUT
IN
After reset
00100110
b0: Specifies the input mode of the S0 port. “0” = OFF mode (high impedance); “1” = IN (input mode).
b1: Specifies the I/O mode of the KI/O port.
“0” = IN (input mode); “1” = OUT (output mode).
b2: Specifies the I/O mode of the S1/LED port. “0” = S1 (input mode); “1” = LED (output mode).
b4: Specifies the connection of a pull-down resistor in S0/S1 port input mode. “0” = OFF (not connected);
“1” = ON (connected)
b5: Specifies the connections of a pull-down resistor in KI port. “0” = OFF (not connected);
“1” = ON (connected).
Remark In output mode or in OFF mode, all the pull-down resistors are automatically disconnected.



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