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PDF UPD66P04B Data sheet ( Hoja de datos )

Número de pieza UPD66P04B
Descripción 4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD66P04B
4-BIT SINGLE-CHIP MICROCONTROLLER
FOR INFRARED REMOTE CONTROL TRANSMISSION
DESCRIPTION
The µPD66P04B is a microcontroller for infrared remote control transmitters which is provided with a one-time
PROM as the program memory.
Because users can write programs for the µPD66P04B, it is ideal for program evaluation and small-scale
production of the application systems using the µPD6604.
When reading this document, also refer to the µPD6604 Data Sheet (U11281E).
FEATURES
• Program memory (one-time PROM) : 1002 × 10 bits
• Data memory (RAM)
: 32 × 4 bits
• Built-in carrier generation circuit for infrared remote control
• 9-bit programmable timer
: 1 channel
• Command execution time
: 16 µs (when operating at fOSC = 500 kHz: RC oscillation)
• Stack level
: 1 level (Stack RAM is for data memory RF as well.)
• I/O pins (KI/O)
: 8 units
• Input pins (KI)
: 4 units
• Sense input pin (S0)
: 1 unit
• S1/LED pin (I/O)
: 1 unit (When in output mode, this is the remote control transmission
display pin.)
• Power supply voltage
: VDD = 2.2 to 3.6 V
• Operating ambient temperature : TA = –40 to +85 °C
• Oscillator frequency
: fOSC = 300 kHz to 1 MHz
• POC circuit
APPLICATION
Infrared remote control transmitter (for AV and household electric appliances)
Because the µPD66P04B uses an RC oscillation system clock, its accuracy and stability are lower than
the models using ceramic oscillation.
In applications where the clock accuracy and stability pose a problem, use the µPD61P34B (ceramic
oscillation type).
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for availability
and additional information.
Document No. U13596EJ2V0DS00 (2nd edition)
Date Published June 1999 N CP(K)
Printed in Japan
The mark shows major revised points.
©
1998,1999

1 page




UPD66P04B pdf
µPD66P04B
1. PIN FUNCTIONS
1.1 Normal Operating Mode
Pin No.
1
2
15-20
Symbol
KI/O0-KI/O7
3 S0
4 S1/LED
5 REM
6 VDD
7 OSCOUT
8 OSCIN
Function
These pins refer to the 8-bit I/O ports. I/O switching can
be made in 8-bit units.
In INPUT mode, a pull-down resistor is added.
In OUTPUT mode, they can be used as the key scan
output of the key matrix.
Refers to the input port.
Can also be used as the key return input of the key
matrix.
In INPUT mode, the availability of the pull-down resistor
of the S0 and S1 ports can be specified by software in
terms in 2-bit units.
If INPUT mode is canceled by software, this pin is placed
in OFF mode and enters the high-impedance state.
Refers to the I/O port.
In INPUT mode (S1), this pin can also be used as the key
return input of the key matrix.
The availability of the pull-down resistor of the S0 and S1
ports can be specified by software in 2-bit units.
In OUTPUT mode (LED), it becomes the remote control
transmission display output (active low). When the
remote control carrier is output from the REM output, this
pin outputs the low level from the LED output synchronously
with the REM signal.
Refers to the infrared remote control transmission output.
The output is active high.
Carrier frequency: fOSC, fOSC/8, fOSC/12, high-level,
fOSC/2, fOSC/16, fOSC/24
(usable on software)
Refers to the power supply.
These pins are used for RC oscillation.
Output Format
CMOS
push-pullNote 1
CMOS push-pull
CMOS push-pull
9
10
11-14
GND
RESET
KI0-KI3Note 2
Refers to the ground.
Normally, this pin is a system reset input. By inputting
a low level, the CPU can be reset. When resetting with
the POC circuit a low level is output. A pull-up resistor
is incorporated.
These pins refer to the 4-bit input ports.
They can be used as the key return input of the key
matrix.
The use of the pull-down resistor can be specified by
software in 4-bit units.
When Reset
High-level output
High-impedance
(OFF mode)
High-level output
(LED)
Low-level output
High-impedance
(oscillation stopped)
Low level
(oscillation stopped)
Input (low-level)
Notes 1. Be careful about this because the drive capability of the low-level output side is held low.
2. In order to prevent malfunction, be sure to input a low level to more than one of pins KI0 to KI3 when
reset is released (when RESET pin changes from low level to high level, or POC is released due to
supply voltage startup).
Data Sheet U13596EJ2V0DS00
5

5 Page





UPD66P04B arduino
µPD66P04B
3.2 Program Memory Writing Procedure
The program memory is written at high speed in the following procedure.
(1) Pull down the pins not used to GND via resistor. Keep the CLK pin low.
(2) Supply 5 V to the VDD pin. Keep the VPP pin low.
(3) Supply 5 V to the VPP pin after waiting for 10 µs.
(4) Wait for 2 ms until oscillation of the clock connected across the OSCIN and OSCOUT pins stabilizes.
(5) Set the program memory address 0 clear mode by using the mode setting pins.
(6) Supply 6 V to VDD and 12.5 V to VPP.
(7) Set the program inhibit mode.
(8) Write data to the program memory in the 1-ms write mode.
(9) Set the program inhibit mode.
(10) Set the verify mode. If the data have been written to the program memory, proceed to (11). If not, repeat
steps (8) through (10).
(11) Additional writing of (number of times of writing in (8) through (10): X) × 1 ms.
(12) Set the program inhibit mode.
(13) Input a pulse to the CLK pin four times to update the program memory address (+1).
(14) Repeat steps (8) through (13) up to the last address.
(15) Set the 0 clear mode of the program memory address.
(16) Change the voltages on the VDD and VPP pins to 5 V.
(17) Turn off power.
The following figure illustrates steps (2) through (13) above.
Oscillation stabilization
wait time
Reset
Repeated X time
Write
Verify
VPP
VPP
VDD
GND
VDD+1
VDD
VDD
GND
CLK
Additional write
Address
increment
D0-D7
Hi-Z
Data input
Hi-Z Data output
Hi-Z Data input
Hi-Z
MD0
MD1
MD2
MD3
Data Sheet U13596EJ2V0DS00
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