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“Standard”:
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DATA SHEET
MOS INTEGRATED CIRCUIT
µ
PD67B, 68B
4-BIT SINGLE-CHIP MICROCONTROLLERS
FOR INFRARED REMOTE CONTROL TRANSMISSION
DESCRIPTION
With their 1.65 V low-voltage operation, carrier generator for infrared remote control transmission, standby
release function through key input, and programmable timer, the
µ
PD67B and 68B are ideal for infrared remote
control transmitters.
A one-time PROM product, the
µ
PD6P9, has also been provided for the
µ
PD67B and 68B for program evaluation
or small-quantity production.
FEATURES
• Program memory (ROM)
•
µ
PD67B:
•
µ
PD68B:
1,002
×
10 bits
2,026
×
10 bits
• Data memory (RAM): 32
×
4 bits
• On-chip carrier generator for infrared remote control: Each high-/low-level width can be set from 250 ns to 64
µ
s (@ f
X
= 4 MHz operation) via modulo registers
• 9-bit programmable timer: 1 channel
• Instruction execution time: 16
µ
s (@ f
X
= 4 MHz operation: ceramic oscillation)
• Stack level:
• I/O pins (K
I/O
):
• Input pins (K
I
):
• S
1
/LED pin (I/O):
• Power supply voltage:
• Operating ambient temperature:
• Oscillation frequency:
1 level (stack RAM is also used as data memory RF)
8
4
1 (when in output mode, this is the remote control transmission display pin)
V
DD
= 1.65 to 3.6 V
T
A
= –40 to +85°C
f
X
= 3.5 to 4.5 MHz
• Sense input pins (S
0
, S
2
): 2
• On-chip POC circuit and RAM retention detector
APPLICATIONS
Infrared remote control transmitters (for AV and household electric appliances)
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 products and/or types are available in every country. Please check with an NEC Electronics
sales representative for availability and additional information.
Document No. U16792EJ1V1DS00 (1st edition)
Date Published August 2005 N CP(K)
Printed in Japan
The mark
shows major revised points.
2004
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