SM39R4051 Datasheet, PDF (1/47 Pages) SyncMOS Technologies,Inc – One serial peripheral interfaces in full duplex mode

SM39R4051/SM39R2051
8-Bit Micro-controller
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