NEC PD754244 Manuel D’Utilisation

User’s Manual  U10676EJ3V0UM

Item

µ

PD754144

µ

PD754244

Instruction execution time

• 4, 8, 16, 64 

µ

s (at f

CC

 = 1.0 MHz)

• 0.95, 1.91, 3.81, 15.3 

µ

s

(at f

X

 = 4.19 MHz)

• 0.67, 1.33, 2.67, 10.7 

µ

s

(at f

X

 = 6.00 MHz)

On-chip

Mask ROM

4096 

× 8 bits (0000H to 0FFFH)

memory

RAM

128 

× 4 bits (000H to 07FH)

EEPROM

16 

× 8 bits (400H to 41FH)

System clock oscillator

RC oscillator

Crystal/ceramic oscillator

(External resistor and capacitor)

General-purpose registers

• 4-bit operation:  8 

× 4 banks

• 8-bit operation:  4 

× 4 banks

I/O ports

CMOS input

4

Pull-up resistors can be incorporated by mask option

CMOS I/O

9

On-chip pull-up resistors can be specified by software

Total

13

Timers

4 channels

• 8-bit timer counter:

3 channels

(can be used as 16-bit timer counter)

• Basic interval/watchdog timer: 1 channel

Programmable threshold port

2 channels

Bit sequential buffer

16 bits

Vectored interrupt

External:  1, Internal:  5

Test input

External:  1 (with key return reset function)

Standby function

STOP/HALT mode

Operating ambient temperature

T

A

 = –40 to +85

°C

Power supply voltage

V

DD

 = 1.8 to 6.0 V

Package

• 20-pin plastic SOP (7.62 mm (300))

• 20-pin plastic SSOP (7.62 mm (300))