NEC PD754144, PD754244 18 , 1.1 Functional Outline

CHAPTER 1 GENERAL
18 User’s Manual U10676EJ3V0UM
1.1 Functional Outline
Item µ PD754144 µ PD754244
Instruction execution time • 4, 8, 16, 64 µ s (at fCC = 1.0 MHz) • 0.95, 1.91, 3.81, 15.3 µ s
(at fX = 4.19 MHz)
• 0.67, 1.33, 2.67, 10.7 µ s
(at fX = 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 TA = –40 to +85°C
Power supply voltage VDD = 1.8 to 6.0 V
Package • 20-pin plastic SOP (7.62 mm (300))
• 20-pin plastic SSOP (7.62 mm (300))