HT66F016 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT66F016' PDF : 116 Pages View PDF
HT66F016/HT66F017/HT68F016/HT68F017
HT66F016R/HT66F017R/HT68F016R/HT68F017R
· LVRC Register
Bit
Name
R/W
POR
7
LVS7
R/W
0
6
LVS6
R/W
1
5
LVS5
R/W
0
4
LVS4
R/W
1
3
LVS3
R/W
0
2
LVS2
R/W
1
1
LVS1
R/W
0
0
LVS0
R/W
1
Bit 7~0
LVS7~LVS0: LVR Voltage Select control
01010101: 2.1V
00110011: 2.55V
10011001: 3.15V
10101010: 3.8V
Any other value: Generates MCU reset -- LVRC register is reset to POR value
When an actual low voltage condition occurs, as specified by one of the four defined LVR voltage
values above, an MCU reset will be generated. The reset operation will be activated after 2~3
LIRC clock cycles. In this situation the register contents will remain the same after such a reset
occurs.
Any register value, other than the four defined LVR values above, will also result in the
generation of an MCU reset. The reset operation will be activated after 2~3 LIRC clock cycles.
However in this situation the register contents will be reset to the POR value.
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
TBHP
STATUS
SMOD
LVDC
INTEG
INTC0
INTC1
INTC2
MFI0
MFI1
MFI2
PA
Reset
(Power-on)
RES or LVR
WDT Time-out WDT Time-out
Reset
(Normal Operation)
(IDLE)
llll
llll
llll
llll
llll
llll
llll
l
l
l
l
llll
llll
llll
llll
l
l
l
l
ll
ll
llll
l
l
llll
llll
llll
xxxx xxxx
xxxx xxxx
---- ---0
xxxx xxxx
0000 0000
xxxx xxxx
xxxx xxxx
---- -xxx
---- --xx
--00 xxxx
0000 0011
--00 -000
---- 0000
-000 0000
--00 -000
0000 0000
0-00 0-00
--00 --00
--00 --00
--00 --00
--00 --00
1111 1111
xxxx xxxx
xxxx xxxx
---- ---0
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0000 0000
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---- -uuu
---- --uu
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0000 0011
--00 -000
---- 0000
-000 0000
--00 -000
0000 0000
0-00 0-00
--00 --00
--00 --00
--00 --00
--00 --00
1111 1111
xxxx xxxx
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---- ---0
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0000 0000
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---- -uuu
---- --uu
--1u uuuu
0000 0011
--00 -000
---- 0000
-000 0000
--00 -000
0000 0000
0-00 0-00
--00 --00
--00 --00
--00 --00
--00 --00
1111 1111
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---- ---u
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0000 0000
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---- -uuu
---- --uu
--11 uuuu
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--uu -uuu
---- uuuu
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Rev. 1.40
44
November 22, 2016
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