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參數(shù)資料
| 型號： | HT48RA0 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Remote Type 8-Bit MCU |
| 中文描述： | 遠(yuǎn)程型8位微控制器 |
| 文件頁數(shù)： | 8/32頁 |
| 文件大?。?/td> | 238K |
| 代理商： | HT48RA0 |
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HT48RA0-2/HT48CA0-2
Rev. 1.50
8
July 23, 2004
Reset
Therearethreewaysinwhicharesetcanoccur:
RES reset during normal operation
RES reset during HALT
WDT time-out reset during normal operation
Some registers remain unchanged during reset condi-
tions. Most registers are reset to the initial condition
when the reset conditions are met. By examining the
PDF and TO flags, the program can distinguish between
different chip resets .
TO
PDF
RESET Conditions
0
0
RES reset during power-up
u
u
RES reset during normal operation
0
1
RES wake-up HALT
1
u
WDT time-out during normal operation
Note: u
means unchanged.
To guarantee that the system oscillator has started and
stabilized, the SST (System Start-up Timer) provides an
extra-delay of 1024 system clock pulses when the sys-
tem powers up or when the system awakes from a HALT
state.
Whenasystempowerupoccurs,anSSTdelayisadded
during the reset period. But when the reset comes from
the RES pin, the SST delay is disabled. Any wake-up
from HALT will enable the SST delay.
The functional unit chip reset status is shown below.
PC
000H
WDT Prescaler
Clear
Input/Output ports
Input mode
SP
Points to the top of the stack
Carrier output
Low level
+
+
:
=
A
:
#
$ :
1 #
Reset Configuration
Reset Circuit
#
:
! # #
Reset Timing Chart
The chip reset status of the registers is summarized in the following table:
Register
Reset
(Power On)
WDT Time-out
(Normal Operation)
RES Reset
(Normal Operation)
RES Reset
(HALT)
WDT Time-out
(HALT)*
Program Counter
000H
000H
000H
000H
000H
MP
-xxx xxxx
-uuu uuuu
-uuu uuuu
-uuu uuuu
-uuu uuuu
ACC
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLP
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLH
--xx xxxx
--uu uuuu
--uu uuuu
--uu uuuu
--uu uuuu
STATUS
--00 xxxx
--1u uuuu
--uu uuuu
--01 uuuu
--11 uuuu
PA
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PB
0011 1111
0011 1111
0011 1111
0011 1111
uuuu uuuu
PC
---- ---1
---- ---1
---- ---1
---- ---1
---- ---u
Note:
u
means unchanged
x
means unknown
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT48RA0-2 | Remote Type 8-Bit MCU |
| HT48CA0 | 8-BIT MICROCONTROLLER |
| HT48CA1 | Remote Type 8-Bit MCU |
| HT48RA1 | Remote Type 8-Bit MCU |
| HT48CA3 | 8-Bit Remote Type MCU |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT48RA0(20DIP-A) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| HT48RA0(20SOIC-A) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| HT48RA0(24SOIC-A) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| HT48RA0-1 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
| HT48RA0-2 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Remote Type 8-Bit MCU |
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