SM39R08A5

8-Bit Micro-controller

with 8KB Flash

& 256B RAM embedded

Specifications subject to change without notice contact your sales representatives for the most recent information.

ISSFD-M067

Ver E

SM39R08A5

06/30/2015

- 1 -

Table of Contents

Product List .......................................................................................................................................................................... 3

Description ........................................................................................................................................................................... 3

Features............................................................................................................................................................................... 3

Pin Configuration ................................................................................................................................................................. 4

Block Diagram...................................................................................................................................................................... 5

Pin Description..................................................................................................................................................................... 6

Special Function Register (SFR) ......................................................................................................................................... 7

Function Description .......................................................................................................................................................... 10

1.

General Features ........................................................................................................................................................ 10

1.1.

Embedded Flash .......................................................................................................................................... 10

1.2.

IO Pads ........................................................................................................................................................ 10

1.3.

Instruction timing Selection .......................................................................................................................... 10

1.4.

The Clock Output Selection ..........................................................................................................................11

1.5.

RESET ..........................................................................................................................................................11

1.5.1.

Hardware RESET function ...............................................................................................................11

1.5.2.

Software RESET function ................................................................................................................11

1.5.3.

Reset status .....................................................................................................................................11

1.5.4.

Time Access Key register (TAKEY)................................................................................................. 12

1.5.5.

Software Reset register (SWRES).................................................................................................. 12

1.5.6.

Example of software reset .............................................................................................................. 12

1.6.

Clocks .......................................................................................................................................................... 12

2.

Instruction Set ............................................................................................................................................................. 14

3.

Memory Structure ........................................................................................................................................................ 18

3.1.

Program Memory ......................................................................................................................................... 18

3.2.

Data Memory................................................................................................................................................ 19

3.2.1.

Data memory - lower 128 byte (00h to 7Fh) ................................................................................... 19

3.2.2.

Data memory - higher 128 byte (80h to FFh) ................................................................................. 19

4.

CPU Engine................................................................................................................................................................. 20

4.1.

Accumulator ................................................................................................................................................. 20

4.2.

B Register .................................................................................................................................................... 20

4.3.

Program Status Word................................................................................................................................... 21

4.4.

Stack Pointer ................................................................................................................................................ 21

4.5.

Data Pointer ................................................................................................................................................. 21

4.6.

Data Pointer 1 .............................................................................................................................................. 22

4.7.

Interface control register .............................................................................................................................. 22

5.

GPIO............................................................................................................................................................................ 23

5.1.

SFR Setting Method..................................................................................................................................... 23

5.2.

Software of Writer Setting Method ............................................................................................................... 23

6.

Timer 0 and Timer 1 .................................................................................................................................................... 24

6.1.

Timer/counter mode control register (TMOD) .............................................................................................. 24

6.2.

Timer/counter control register (TCON) ........................................................................................................ 25

6.3.

Enhance Interrupt Trigger SFR(ENHIT)....................................................................................................... 25

6.4.

T0、T1 signal swapping .............................................................................................................................. 26

7.

Serial interface ............................................................................................................................................................ 27

7.1.

Mode 0 ......................................................................................................................................................... 28

7.2.

Mode 1 ......................................................................................................................................................... 28

7.3.

Mode 2 ......................................................................................................................................................... 29

7.4.

Mode 3 ......................................................................................................................................................... 29

7.5.

Multiprocessor communication .................................................................................................................... 29

7.6.

Baud rate generator ..................................................................................................................................... 30

8.

Watchdog timer ........................................................................................................................................................... 31

9.

Interrupt ....................................................................................................................................................................... 35

10. Power Management Unit............................................................................................................................................. 40

10.1.

Idle mode ..................................................................................................................................................... 40