HT56R66 Holtek Semiconductor Inc., HT56R66 Datasheet - Page 76

• Manufacturer Part Number: HT56R66
• Description: Tinypower Tm A/d Type With Lcd 8-bit Otp Mcu
• Manufacturer: Holtek Semiconductor Inc.

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.
Rev. 1.10
MP0
MP1
BP
ACC
PCL
TBLP
TBLH
RTCC
STATUS
INTC0
TMR0
TMR0C
TMR1H
TMR1L
TMR1C
TMR2
TMR2C
TMR3
TMR3C
PA
PAC
PB
PBC
PC
PCC
PD
PDC
PWM0L
PWM0H
PWM1L
PWM1H
INTC1
PWM2L
PWM2H
PWM3L
Register
0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0
0 0
0 0 0 0 1
0 0
0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
0 0 0
(Power-on)
0
0 0 0 1 1 1
0 0 x x x x
Reset
0 1 0 0 0
0 1 0 0 0
0 1 0 0 0
0 0 0
0 0
0
0
0
0
(Normal Operation)
u u u u u u u u
u u u u u u u u
u u u u u u u u
0 0 0 0 0 0 0 0
u u u u u u u u
u u u u u u u u
0 0 0 0 0 0 0 0
0 0
0 0 0 0 1
0 0
0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
0 0 0
RES Reset
0
0 0 0 1 1 1
u u u u u u
0 1 0 0 0
0 1 0 0 0
0 1 0 0 0
76
0 0 0
0 0
0
0
0
0
(Normal Operation)
u u u u u u u u
u u u u u u u u
u u u u u u u u
0 0 0 0 0 0 0 0
u u u u u u u u
u u u u u u u u
0 0 0 0 0 0 0 0
0 0
0 0 0 0 1
0 0
0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
0 0 0 0 0 0 0 0
0 0 0 0
WDT Time-out
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
x x x x x x x x
0 0 0
0
0 0 0 1 1 1
1 u u u u u
0 1 0 0 0
0 1 0 0 0
0 1 0 0 0
0 0 0
HT56R66/HT56R666
0 0
0
0
0
0
u u u u u u u u
u u u u u u u u
u u u u u u u u
0 0 0 0 0 0 0 0
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u
u u u u u u u u
u u u u u u u u
u u u u u
u u u u u u u u
u u
u u u u u u u u
u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u u u u u
u u u u
u u u u u u u u
u u u u
u u u u u u u u
u u u u
u u u u u u u u
u u u u
WDT Time-out
September 8, 2009
u u u
u
u u u u u u
1 1 u u u u
(HALT)
u u u u u
u u u u u
u u u u u
u u u
u u
u
u
u
u