SM39R4051/SM39R2051
8-Bit Micro-controller
FOSVOS TEL: 021-58998693
4KB/2KB with ISP Flash
& 256B RAM embedded
Description ..........................................................................................................................................................................3
Features..............................................................................................................................................................................3
Pin Configuration ................................................................................................................................................................4
Block Diagram.....................................................................................................................................................................5
Pin Description....................................................................................................................................................................6
Special Function Register (SFR) ........................................................................................................................................7
Function Description ...........................................................................................................................................................9
1.
General Features .......................................................................................................................................................9
1.1.
Embedded Flash ...........................................................................................................................................9
1.2.
IO Pads .........................................................................................................................................................9
1.3.
Instruction timing Selection ...........................................................................................................................9
1.4.
RESET ........................................................................................................................................................10
1.4.1.
Hardware RESET function .............................................................................................................10
1.4.2.
Software RESET function ..............................................................................................................10
1.4.3.
Time Access Key register (TAKEY)................................................................................................10
1.4.4.
Software Reset register (SWRES).................................................................................................11
1.4.5.
Example of software reset .............................................................................................................11
1.5.
Clocks .........................................................................................................................................................11
2.
Instruction Set ..........................................................................................................................................................12
3.
Memory Structure.....................................................................................................................................................16
3.1.
Program Memory ........................................................................................................................................16
3.2.
Data Memory...............................................................................................................................................17
3.2.1.
Data memory - lower 128 byte (00h to 7Fh) ..................................................................................18
3.2.2.
Data memory - higher 128 byte (80h to FFh) ................................................................................18
4.
CPU Engine .............................................................................................................................................................19
4.1.
Accumulator ................................................................................................................................................19
4.2.
B Register ...................................................................................................................................................19
4.3.
Program Status Word..................................................................................................................................20
4.4.
Stack Pointer ...............................................................................................................................................20
4.5.
Data Pointer ................................................................................................................................................20
4.6.
Data Pointer 1 .............................................................................................................................................21
4.7.
Interface control register .............................................................................................................................21
5.
GPIO ........................................................................................................................................................................22
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.
T0、T1 signal swapping：..........................................................................................................................25
7.
Serial interface 0 ......................................................................................................................................................26
7.1.
Mode 0 ........................................................................................................................................................27
7.2.
Mode 1 ........................................................................................................................................................27
7.3.
Mode 2 ........................................................................................................................................................28
7.4.
Mode 3 ........................................................................................................................................................28
7.5.
Multiprocessor communication of Serial Interface 0 ...................................................................................28
7.6.
Baud rate generator ....................................................................................................................................29
7.6.1.
Serial interface 0 modes 1 and 3 ...................................................................................................29
7.6.2.
Clock source for baud rate.............................................................................................................29
8.
Watchdog timer ........................................................................................................................................................30
9.
Interrupt ....................................................................................................................................................................33
9.1.
Priority level structure..................................................................................................................................35
10.
Power Management Unit.................................................................................................................................36
10.1.
Idle mode ................................................................................................................................................36
10.2.
Stop mode...............................................................................................................................................36
11.
IIC function ......................................................................................................................................................37
12.
LVI – Low Voltage Interrupt .............................................................................................................................41
13.
In-System Programming (Internal ISP) ...........................................................................................................42
13.1.
ISP service program ...............................................................................................................................42
13.2.
Lock Bit (N) .............................................................................................................................................42
Specifications subject to change without notice contact your sales representatives for the most recent information.
ISSFD-M055
1
Ver.E SM39R4051 09/2011
SYNCMOS [ SYNCMOS TECHNOLOGIES,INC ]
