HT49CA1 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT49CA1' PDF : 58 Pages View PDF
HT49RA1/HT49CA1
The different kinds of resets all affect the internal registers of the microcontroller in different ways. To ensure reliable
continuation of normal program execution after a reset occurs, it is important to know what condition the microcontroller
is in after a particular reset occurs. The following table describes how each type of reset affects each of the
microcontroller internal registers. Note that where more than one package type exists the table will reflect the situation
for the larger package type.
Register
MP0
MP1
BP
ACC
PCL
TBLP
TBLH
RTCC
STATUS
INTC0
TMR0
TMR0C
TMR1H
TMR1L
TMR1C
PA
PB
PC
PCC
PD
INTC1
LCDC
Reset
(Power-on)
xxxx xxxx
xxxx xxxx
0000 0000
xxxx xxxx
0000 0000
xxxx xxxx
-xxx xxxx
--00 0111
--00 xxxx
-000 0000
xxxx xxxx
0000 1---
xxxx xxxx
xxxx xxxx
0000 1---
1111 1111
1111 1111
---- ---1
---- ---1
---- 1111
-000 -000
0000 --11
RES or LVR
Reset
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
0000 0000
uuuu uuuu
-uuu uuuu
--00 0111
--uu uuuu
-000 0000
xxxx xxxx
0000 1---
xxxx xxxx
xxxx xxxx
0000 1---
1111 1111
1111 1111
---- ---1
---- ---1
---- 1111
-000 -000
0000 --11
WDT Time-out
(Normal Operation)
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
0000 0000
uuuu uuuu
-uuu uuuu
--00 0111
--1u uuuu
-000 0000
xxxx xxxx
0000 1---
xxxx xxxx
xxxx xxxx
0000 1---
1111 1111
1111 1111
---- ---1
---- ---1
---- 1111
-000 -000
0000 --11
WDT Time-out
(HALT)
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
-uuu uuuu
--uu uuuu
--11 uuuu
-uuu uuuu
uuuu uuuu
uuuu u---
uuuu uuuu
uuuu uuuu
uuuu u---
uuuu uuuu
uuuu uuuu
---- ---u
---- ---u
---- uuuu
-uuu -uuu
0000 --uu
²u² stands for unchanged
²x² stands for unknown
²-² stands for unimplemented
Rev. 1.10
36
March 30, 2014
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