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HT66F20 Enhanced A/D Flash Type MCU 8-Bit MCU with EEPROM Holtek
Holtek Semiconductor Holtek
HT66F20 Datasheet PDF : 246 Pages
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HT66F20/HT66F30/HT66F40/HT66F50/HT66F60
HT66FU30/HT66FU40/HT66FU50/HT66FU60
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.
· HT66F20 Register
Register
MP0
MP1
Reset
(Power-on)
-xxx xxxx
-xxx xxxx
RES or LVR
Reset
-xxx xxxx
-xxx xxxx
WDT Time-out
(Normal Operation)
-xxx xxxx
-xxx xxxx
WDT Time-out
(IDLE)
-uuu uuuu
-uuu uuuu
BP
ACC
PCL
TBLP
---- ---0
xxxx xxxx
0000 0000
xxxx xxxx
---- ---0
uuuu uuuu
0000 0000
uuuu uuuu
---- ---0
uuuu uuuu
0000 0000
uuuu uuuu
---- ---u
uuuu uuuu
0000 0000
uuuu uuuu
TBLH
--xx xxxx
--uu uuuu
--uu uuuu
--uu uuuu
TBHP
---- --xx
---- --uu
---- --uu
---- --uu
STATUS
SMOD
--00 xxxx
0000 0011
--uu uuuu
0000 0011
--1u uuuu
0000 0011
--11 uuuu
uuuu uuuu
LVDC
--00 -000
--00 -000
--00 -000
--uu -uuu
INTEG
WDTC
TBC
---- 0000
0111 1010
0011 0111
---- 0000
0111 1010
0011 0111
---- 0000
0111 1010
0011 0111
---- uuuu
uuuu uuuu
uuuu uuuu
INTC0
INTC1
INTC2
-000 0000
0000 0000
0000 0000
-000 0000
0000 0000
0000 0000
-000 0000
0000 0000
0000 0000
-uuu uuuu
uuuu uuuu
uuuu uuuu
MFI0
MFI1
MFI2
PAWU
PAPU
PA
PAC
--00 --00
--00 --00
0000 0000
0000 0000
0000 0000
1111 1111
1111 1111
--00 --00
--00 --00
0000 0000
0000 0000
0000 0000
1111 1111
1111 1111
--00 --00
--00 --00
0000 0000
0000 0000
0000 0000
1111 1111
1111 1111
--uu --uu
--uu --uu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
PBPU
--00 0000
--00 0000
--00 0000
--uu uuuu
PB
--11 1111
--11 1111
--11 1111
--uu uuuu
PBC
--11 1111
--11 1111
--11 1111
--uu uuuu
PCPU
---- 0000
---- 0000
---- 0000
---- uuuu
PC
PCC
ADRL (ADREF=0)
ADRL (ADREF=1)
ADRH (ADREF=0)
---- 1111
---- 1111
xxxx ----
xxxx xxxx
xxxx xxxx
---- 1111
---- 1111
xxxx ----
xxxx xxxx
xxxx xxxx
---- 1111
---- 1111
xxxx ----
xxxx xxxx
xxxx xxxx
---- uuuu
---- uuuu
uuuu ----
uuuu uuuu
uuuu uuuu
Rev. 1.10
49
February 1, 2010
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