NEC PD75402A, PD75P402 General Outline of Functions, For details, see Interrupt Functions

CHAPTER 1. GENERAL

1.1OUTLINE OF FUNCTIONS

Item			Description
Number of basic		37
instructions
Instruction		•	0.95 μs, 1.91 μs, 15.3 μs (at 4.19 MHz operation)
execution time			selectable between 3 levels
Built-in	Program	1920 × 8 bits (μPD75402A: Mask ROM, μPD75P402: One-time PROM)
memory	memory
	Data	64 × 4 bits (RAM)
	memory
General register		4 bits × 4, or 8 bits × 2 (memory mapping)
Accumulators		3 accumulators to suit manipulation data length
		•	Bit accumulator (CY), 4-bit accumulator (A), 8-bit accumulator (XA)
I/O line		Total 22 lines
		•	CMOS input port	: 6 lines
		•	CMOS input/output port (LED direct drivable 8 lines)	: 12 lines
		•	N-ch open-drain input/ output port (LED direct drivable)	: 4 lines
Pull-up resistor		•	Pull-up resistor built-in control possible by software	: 16 lines
		•	Pull-up resistor built-in control possible by mask option (μPD75402A only)	: 4 lines
Clock output		•	1.05 MHz, 524 kHz, 65.5 kHz (at 4.19 MHz operation)
		•	Applicable to remote control output
Timer/Counter		8-bit basic interval timer
		•	Reference time generation (1.95 ms, 31.3 ms : at 4.19 MHz operation)
		•	Watchdog timer applicable
Serial interface		•	8 bits
		•	2 transfer modes (clock synchronous 3-wire system mode/SBI mode)
Vectored		External: 1 line, internal : 2 lines
interrupt
Test input		External: 1 line
		(For details, see CHAPTER 6 “INTERRUPT FUNCTIONS”.)
Standby		STOP mode/HALT mode
Instruction set		•	Bit manipulation instruction (set, clear, test, Boolean operation)
		•	1-byte relative branch instruction
		•	4-bit operation instruction (add, Boolean operation, compare)
		•	4, 8-bit data transfer instruction
Package		•	28-pin plastic DIP (600 mil)
		•	28-pin plastic shrink DIP (400 mil)
		•	44-pin plastic QFP ( ■ 10 mm)

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