HT82A520R_10 Datasheet, PDF (27/72 Pages) Holtek Semiconductor Inc – Full Speed USB 8-Bit OTP MCU with SPI

HT82A520R/HT82A620R
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 the microcontroller in-
ternal registers.
Register
Reset
(Power-on)
WDT Time-out
(Normal
Operation)
RES Reset
(Normal
Operation)
MP0
xxxx xxxx xxxx xxxx
xxxx xxxx
MP1
xxxx xxxx xxxx xxxx
xxxx xxxx
ACC
xxxx xxxx uuuu uuuu uuuu uuuu
PCL
0000 0000 0000 0000 0000 0000
TBLP
xxxx xxxx uuuu uuuu uuuu uuuu
TBLH
xxxx xxxx uuuu uuuu uuuu uuuu
WDTS
---- -111
---- -111
---- -111
STATUS
--00 xxxx
--1u uuuu
--00 uuuu
INTC0
0000 0000 0000 0000 0000 0000
TMRH
xxxx xxxx xxxx xxxx
xxxx xxxx
TMRL
xxxx xxxx xxxx xxxx
xxxx xxxx
TMRC
00-0 1---
00-0 1---
00-0 1---
PA
1111 1111 1111 1111 1111 1111
PAC
1111 1111 1111 1111 1111 1111
PB
1111 1111 1111 1111 1111 1111
PBC
1111 1111 1111 1111 1111 1111
PC
1111 1111 1111 1111 1111 1111
PCC
1111 1111 1111 1111 1111 1111
PWM0DRL 0000 --00 0000 --00
0000 --00
PWM0DRH 0000 0000 0000 0000 0000 0000
PWMBR0 0000 0000 0000 0000 0000 0000
PWM1DRL 0000 --00 0000 --00
0000 --00
PWM1DRH 0000 0000 0000 0000 0000 0000
PWMBR1 0000 0000 0000 0000 0000 0000
PWM2DRL 0000 --00 0000 --00
0000 --00
PWM2DRH 0000 0000 0000 0000 0000 0000
PWMBR2 0000 0000 0000 0000 0000 0000
ADRL(**)
xxxx ----
xxxx ----
xxxx ----
ADRH(**) xxxx xxxx xxxx xxxx
xxxx xxxx
ADCR(**) 0100 0000 0100 0000 0100 0000
ACSR(**) 0000 0000 0000 0000 0000 0000
USB_STAT --xx 0000
--xx 0000
--xx 0000
UINT
0000 1111 0000 uuuu 0000 1111
TBHP
xxxx xxxx uuuu uuuu uuuu uuuu
USC
1000 0000 uuuu xuux 1000 x00x
USR
0000 0000 uuuu uuuu 0000 0000
RES Reset
(HALT)
xxxx xxxx
xxxx xxxx
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
---- -111
--00 uuuu
0000 0000
xxxx xxxx
xxxx xxxx
00-0 1---
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
0000 --00
0000 0000
0000 0000
0000 --00
0000 0000
0000 0000
0000 --00
0000 0000
0000 0000
xxxx ----
xxxx xxxx
0100 0000
0000 0000
--xx 0000
0000 1111
uuuu uuuu
1000 x00x
0000 0000
WDT
Time-out
(HALT)*
uuuu uuuu
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
---- -111
--11 uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uu-u u---
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu --uu
uuuu uuuu
uuuu uuuu
uuuu --uu
uuuu uuuu
uuuu uuuu
uuuu --uu
uuuu uuuu
uuuu uuuu
xxxx ----
xxxx xxxx
0100 0000
uuuu uuuu
--xx 0000
0000 uuuu
uuuu uuuu
uuuu xuux
uuuu uuuu
USB Reset USB Reset
(Normal) (HALT)
xxxx xxxx
xxxx xxxx
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
---- -111
--uu uuuu
0000 0000
xxxx xxxx
xxxx xxxx
uu-u u---
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
0000 --00
0000 0000
0000 0000
0000 --00
0000 0000
0000 0000
0000 --00
0000 0000
0000 0000
xxxx ----
xxxx xxxx
0100 0000
0000 0000
--xx 0000
0000 1111
uuuu uuuu
1000 0000
00uu 0000
xxxx xxxx
xxxx xxxx
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
---- -uuu
--01 uuuu
0000 0000
xxxx xxxx
xxxx xxxx
uu-u u---
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
1111 1111
0000 --00
0000 0000
0000 0000
0000 --00
0000 0000
0000 0000
0000 --00
0000 0000
0000 0000
uuuu ----
uuuu uuuu
0100 0000
0000 0000
--xx 0000
0000 1111
uuuu uuuu
1000 0000
00uu 0000
Rev.1.20
27
June 23, 2010