HT82M75REW/HT82K75REW
Rev. 1.00
29
June 11, 2010
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.
Register
Reset
(Power-on)
WDT time-out
(Normal Operation)
RES Reset
(Normal Operation)
RES Reset
(HALT)
WDT Time-out
(HALT)*
PCL
000H
000H
000H
000H
000H
ACC
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLP
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
TBLH
-xxx xxxx
-uuu uuuu
-uuu uuuu
-uuu uuuu
-uuu uuuu
STATUS
--00 xxxx
--1u uuuu
--uu uuuu
--01 uuuu
--11 uuuu
INTC
-000 0000
-000 0000
-000 0000
-000 0000
-uuu uuuu
TMRL
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMRH
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
TMRC
00-0 1----
00-0 1----
00-0 1----
00-0 1----
uu-u u---
PA
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PAC
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PB
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PBC
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PC
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PCC
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PD **
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PDC **
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PE **
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
PEC **
1111 1111
1111 1111
1111 1111
1111 1111
uuuu uuuu
WDTS
---- -111
---- -111
---- -111
---- -111
---- -uuu
MP0
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
MP1
xxxx xxxx
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
CTLR
0100 0x00
0100 0x00
0100 0x00
0100 0x00
uuuu uxuu
PTR
0000 0000
0000 0000
0000 0000
0000 0000
uuuu uuuu
TBHP
----- 0000
----- 0000
----- 0000
----- 0000
0000 uuuu
SPIR
0000 0000
0000 0000
0000 0000
0000 0000
0000 uuuu
SBCR
0110 0000
0110 0000
0110 0000
0110 0000
uuuu uuuu
SBDR
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
uuuu uuuu
Note:
²
**
²
For the HT82K75REW only
²
-
²
not implemented
²
u
²
means
²
unchanged
²
²
x
²
means
²
unknown
²
electronic components distributor