BS2824 Holtek Semiconductor Inc., BS2824 Datasheet - Page 44

• Manufacturer Part Number: BS2824
• Description: Touch Key Mcu
• Manufacturer: Holtek Semiconductor Inc.

BS2824/BS2854/BS2868
Touch Key MCU
Rev. 1.00
PCL
MP0
MP1
BP
ACC
TBLP
TBLH
WDTS
STATUS
INTC0
INTC1
TMR0
TMR0C
TMR1
TMR1C
PA
PAC
PAWK
PAPU
PB
PBC
PBPU
PB
PBC
PBPU
PB
PBC
PBPU
PC
PCC
PCPU
PD
Register
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 de-
scribes how each type of reset affects each of the microcontroller internal registers.
0 0 0 0 0 0 0 0
0 0 0 0 1 0 0 0
0 0 0 0 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
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
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 0 0 0 0
0 0 0 0 0 0 0
x x x x x x x
Power-on
0 0
1 1 1 1 1 1
1 1 1 1 1 1
0 0 0 0 0 0
0 0 x x x x
Reset
1 1 1
0 0
1 1
1 1
0 0
0
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
0 0 0 0 1 0 0 0
0 0 0 0 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
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
x x x x x x x x
x x x x x x x x
RES or LVR
u u u u u u u
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
44
u u u u u u
0 0
1 1 1 1 1 1
1 1 1 1 1 1
Reset
1 1 1
1 1
1 1
0 0
0 0
0
(Normal Operation)
WDT Time-out
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
0 0 0 0 1 0 0 0
0 0 0 0 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
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1
0 0 0 0 0 0 0 0
1 1 1 1 1 1 1 1
x x x x x x x x
x x x x x x x x
u u u u u u u
0 0 0 0 0 0 0
0 0 0 0 0 0 0
0 0 0 0 0 0 0
1 u u u u u
0 0
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1
0 0
1 1
1 1
0 0
0
WDT Time-out
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
January 27, 2010
(Idle/Sleep)
u u u u u u u
u u u u u u u
u u u u u u u
u u
1 1 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