DATA SHEET
µ
PD67, 67A, 68, 68A, 69
4-BIT SINGLE-CHIP MICROCONTROLLER
FOR INFRARED REMOTE CONTROL TRANSMISSION
MOS INTEGRATED CIRCUIT
DESCRIPTION
With their 2.0 V low-voltage operation, carrier generator for infrared remote control transmission, standby release
function through key input, and programmable timer, the
µ
PD67, 67A, 68, 68A, and 69 are ideal for infrared remote
control transmitters.
A one-time PROM product, the
µ
PD6P9, has also been provided for the
µ
PD67, 67A, 68, 68A, and 69 for program
evaluation or small-quantity production.
FEATURES
• Program memory (ROM)
•
µ
PD67, 67A: 1,002
×
10 bits
•
µ
PD68, 68A: 2,026
×
10 bits
•
µ
PD69:
4,074
×
10 bits
• Data memory (RAM)
•
µ
PD67, 67A, 68, 68A: 32
×
4 bits
•
µ
PD69:
128
×
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:
• Oscillator frequency:
1 level (Stack RAM is multiplexed with data memory RF.)
8
4
1 (when in output mode, this is the remote control transmission display pin)
V
DD
= 2.0 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
• Capacitor for oscillator: 15 pF (mask option)
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 devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. U14935EJ2V0DS00 (2nd edition)
Date Published May 2002 N CP(K)
Printed in Japan
The mark
shows major revised points.
©
2000
ETC [ ETC ]
