SC73P1601

HANGZHOU SILAN MICROELECTRONICS CO.,LTD

REV:1.4

2009.08.03

Http: www.silan.com.cn

Page 9 of 22

Example: when the crystal oscillator select 455KHz, the corresponding time of port P50 is 2

means the time from TM=1111B to 1101 is 9ms, and the time from TM=1111B to 1110 is 4.5ms.See the following

program:

LD

A#1000B

LD

TM,A

TMRST

……

LD

L,#TEMP

LD

@LL,#1110B

LOOP:

LD

A,TM

XOR

A,@LL

JMPS

LOOP

END

In above program, the time from TMRST start to END is 4.5ms, that it from TM=1111B to 1110B is 4.5ms..

Time change :

4.5ms

9ms

18ms

9ms

36ms

18ms

36ms

9ms

The maximum adjustable time of the timer is 2

it must execute the TMRST instruction and clear the timer in 2

overflow, and causes the MCU to reset.

18. POC Circuit

The POC circuit monitors the power supply voltage and applies an internal reset to the micro-controller.

The POC circuit has the following functions:

3.6V

2.0V

0V

Internal reset signal

Reset

Note 1

Note 2

Operation mode