DESCRIPTION

The SM5K3/5K4/5K5 are CMOS 4-bit single-chip microcomputers incorporating 4-bit parallel processing function, ROM, RAM, 10-bit A/D converter and timer/counters.

It provides three kinds of interrupts and 4 levels subroutine stack. Being fabricated through CMOS process, the chip requires less power and available in a small package : best suitable for Low power controlling, compact equipment like a precision charger.

FEATURES

• ROM capacity : 2 048 x 8 bits

• RAM capacity : 128 x 4 bits

• Instruction sets : 50

• Subroutine nesting : 4 levels

• I/O port :

Input 8

Output 4

Input/output 12 (36QFP/32SOP)

11 (30SDIP)

8 (28SOP)

• Interrupts :

Internal interrupt x 1 (timer)

External interrupt x 2 (2 external interrupt inputs)

• A/D converter :

Resolution 10 bits

Channels 4

• Timer/counter : 8-bit x 1

• Built-in main clock oscillator for system clock

Ceramic/crystal oscillator (SM5K3/5K5)

CR oscillator (SM5K4)

• Signal generation for real time clock∗ (SM5K3/5K5)

• Built-in 15 stages divider (for real time clock∗ : SM5K3/5K5)

• Instruction cycle time :

1 µs (MIN.) (2 MHz, at 5 V ± 10) (SM5K3/5K5)

2 µs (MIN.) (1 MHz, at 2.2 to 5.5 V) (SM5K3/5K5)

1 µs (MIN.) (1.67 MHz ± 20, at 5 V ± 10) (SM5K4)

• Large current output pins (LED direct drive) : 15mA (TYP.) x 4 (sink current)

• Supply voltages :

2.2 to 5.5 V (SM5K3/5K5)

2.7 to 5.5 V (SM5K4)

• Packages :

30-pin SDIP (SDIP030-P-0400)

32-pin SOP (SOP032-P-0525)

36-pin QFP (QFP036-P-1010)

28-pin SOP (SOP028-P-0450) (SM5K3/5K5)

24-pin SSOP (SSOP024-P-0275) (SM5K4)