1 functional outline – NEC PD754144 User Manual
Page 18
CHAPTER 1 GENERAL
18
User’s Manual U10676EJ3V0UM
1.1 Functional Outline
Item
µPD754144
µPD754244
Instruction execution time
• 4, 8, 16, 64
µs (at f
CC
= 1.0 MHz)
• 0.95, 1.91, 3.81, 15.3
µs
(at f
X
= 4.19 MHz)
• 0.67, 1.33, 2.67, 10.7
µs
(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))