SM39R04G1 datasheet(11/47 Pages) SYNCMOS

tên linh kiện	SM39R04G1

Giải thích chi tiết về linh kiện	4K Bytes on-chip flash program memory

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SM39R04G1

8-Bit Micro-controller

4KB with ISP Flash

& 256B RAM embedded

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

ISSFD-M053

11

Ver.H

SM39R04G1

08/2013

Mnemonic: CKCON

Address: 8Eh

7

6

5

4

3

2

1

0

Reset

-

ITS

-

10H

ITS: Instruction timing select.

ITS [6:4]

Instruction timing

000

1T mode

001

2T mode (default)

010

3T mode

011

4T mode

100

5T mode

101

6T mode

110

7T mode

111

8T mode

The default is in 2T mode, and it can be changed to another Instruction timing mode if CKCON [6:4] (at address 8Eh) is

change any time. Not every instruction can be executed with one machine cycle. The exact machine cycle number for all

the instructions are given in the next section.

1.4.

RESET

1.4.1.

Hardware RESET function

SM39R04G1 provides on-chip hardware RESET mechanism,，the reset duration is programmable by writer or ISP。

on-chip hardware RESET duration

25ms (default)

200ms

100ms

50ms

16ms

8ms

4ms

1.4.2.

Software RESET function

SM39R04G1 provides one software reset mechanism to reset whole chip. To perform a software reset, the firmware must

write three specific values 55h, AAh and 5Ah sequentially to the TAKEY register to enable the Software Reset register

(SWRES) write attribute. After SWRES register obtain the write authority, the firmware can write FFh to the SWRES

register. The hardware will decode a reset signal that

“OR” with the other hardware reset. The SWRES register is

self-reset at the end of the software reset procedure.

Mnemonic

Description

Direct

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

RESET

Software Reset function

TAKEY

Time Access Key

register

F7h

TAKEY [7:0]

00H

SWRES

Software Reset

register

E7h

SWRES [7:0]

00H

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