HE83003 Datasheet, PDF (8/23 Pages) King blillion Electronics Co.,Ltd. – 8-BIT MICRO-CONTROLLER

King Billion Electronics Co., Ltd
駿億電子股份有限公司
HE83003
HE80000 SERIES
The contents of
T2H and T2L are
almost loaded into
Timer2 immediately
when Timer2 is
enabled after reset.
T2H
T2L
< Timer2 Counter >
Decreases 1
Auto reload
when Timer2
is underflow
No
Count To
0xFFFFh
Yes
Timer2
Interrupt
Request
T2_INT
9. Watch Dog Timer
Watch Dog Timer (WDT) is designed to reset system automatically prevent system dead lock caused by
abnormal hardware activities or program execution. WDT needs to be enabled in Mask Option.
MO_WDTE
Function
0
WDT disable
1
WDT enable
To use WDT function, “CLRWDT” instruction needs to be executed in every possible program path
when the program runs normally in order to clears the WDT counter before it overflows, so that the
program can operate normally. When abnormal conditions happen to cause the MCU to divert from
normal path, the WDT counter will not be cleared and reset signal will be generated.
WDT is the enabling signal generated by calculating 32768-clock overflow. Reset Register content is
same as TC1 (Timer1 clock), which uses the same clock count source. WDT function can be generated
in Normal, Slow and Idle Mode. However, WDT will not function during Sleep Mode (as the TC1
clock has stopped.)
10. PWM & DAC
The current DAC output pin is VO and its primary function is intended for speech generation, but the
DAC output path can be used in conjunction with built-in OP comparator to function as an
Analog-to-Digital Converter for applications such as speech recording, speech recognition or sensor
interfaces.
September 8, 2004
8
V1.1
This specification is subject to change without notice. Please contact sales person for the latest version before use.