SM5M2

- 1 -

In the absence of confirmation by device specification sheets, SHARP takes no responsibility for any defects that may occur in equipment using any SHARP devices shown in catalogs, data books,

etc. Contact SHARP in order to obtain the latest device specification sheets before using any SHARP device.

DESCRIPTION

The SM5M2 is a CMOS 4-bit single-chip micro-

computer operated on 3.0 V single power supply.

This

microcomputer

integrates

4-bit

parallel

processing function, ROM, RAM, display RAM, 15-

stage divider, 2-kind of interrupt and 4-level of

subroutine stack. With a built-in LCD drive circuit

for a maximum of 136 elements, a 2-mode standby

function, voice synthesizer and a melody generator

circuit in a single chip, the SM5M2 permits the

design of system configuration with a minimum of

peripheral components. It can be used in a variety

of products from handheld equipment to electrical

appliances, such as hand held games with voice,

and also achieves low power consumption.

FEATURES

• ROM capacity :

3 072 x 8 bits (For main program)

64k x 5 bits (For voice)

256 x 6 bits (For melody)

• RAM capacity : 130 x 4 bits (including 34 x 4 bits

display RAM)

• Instruction sets : 51

• Subroutine nesting : 4 levels

• I/O port :

Input

1

Output

6

Input/output

7

• Interrupts :

Internal interrupt

x 1 (divider overflow)

External interrupt

x 1 (INTA)

• Built-in voice synthesizer circuit (APCM) :

Number of phrases : 256

Voice ROM

: 64 k x 5 bits

Bit rate

: 25/35 kbps

Number of coded bit : 5 bits

Sampling frequency : 5/7 kHz

Generation period

: 9.1 to 12.8 s

• Built-in main clock oscillator for system clock

• Built-in sub clock oscillator for real time clock

PIN CONNECTIONS

• Built-in 15 stages divider for real time clock

• Built-in LCD driver :

136 segments, 1/2 bias, 1/4 duty cycle

• Built-in melody generator circuit :

Melody ROM : 256 steps

Generating time (at 32.768 kHz) : 32 s (MAX.)

• Instruction cycle time :

25.9 µs (MIN.) (at 70 kHz ± 10%)

61 µs∗ (TYP.) (at 32.768 kHz)

• Standby function

• Supply voltage : 2.4 to 3.3 V

• Package : 72-pin QFP (QFP072-P-1010)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

54

53

52

51

50

49

48

47

46

45

44

43

42

41

40

(NC)

16

17

18

39

38

37

(NC)

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

72 71 70 69 68 67 66 65 64 63 62 61 60 59 58

34 35 36

57 56 55

INTA

(NC)

T

F

VOICE

VR

SM5M2

4-Bit Single-Chip Microcomputer

(LCD Driver)

72-PIN QFP

TOP VIEW