ht82m9be Holtek Semiconductor Inc., ht82m9be Datasheet - Page 12

• Manufacturer Part Number: ht82m9be
• Description: Ht82m99e/ht82m99a -- Usb Mouse Encoder 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Note: u stands for unchanged
To guarantee that the system oscillator is started and
stabilized, the SST (System Start-up Timer) provides an
extra delay of 1024 system clock pulses when the sys-
tem resets (power-up, WDT time-out or RES reset) or
the system awakes from the HALT state.
When a system reset occurs, the SST delay is added
during the reset period. Any wake-up from HALT will en-
able the SST delay.
The functional unit chip reset status are shown below.
The registers status are summarized in the following table.
Rev. 1.60
Program Counter
Interrupt
Prescaler
WDT
Timer/event Counter Off
Input/output Ports
Stack Pointer
Program
Counter
MP0
MP1
BP
ACC
TBLP
TBLH
WDTS
STATUS
INTC
TMR0
TO PDF
0
u
0
1
1
Register
0
u
0
u
1
RES reset during power-up
RES reset during normal operation
RES wake-up HALT
WDT time-out during normal operation
WDT wake-up HALT
(Power On)
0000 0000
1000 0111
-000 0000
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
--00 xxxx
Reset
000H
RESET Conditions
000H
Disable
Clear
Clear. After master reset,
WDT begins counting
Input mode
Points to the top of the stack
Operation)
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
1000 0111
0000 0000
-000 0000
Time-out
--1u uuuu
(Normal
000H
WDT
RES Reset
Operation)
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
1000 0111
0000 0000
-000 0000
--00 uuuu
(Normal
000H
12
RES Reset
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
1000 0111
0000 0000
-000 0000
--00 uuuu
(HALT)
000H
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
-uuu uuuu
Time-out
--11 uuuu
(HALT)*
000H
WDT
Reset Configuration
Reset Timing Chart
HT82M9BE/HT82M9BA
Reset Circuit
USB Reset
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
1000 0111
uuuu uuuu
-000 0000
--uu uuuu
(Normal)
000H
April 16, 2008
USB Reset
uuuu uuuu
uuuu uuuu
0000 0000
uuuu uuuu
uuuu uuuu
uuuu uuuu
1000 0111
uuuu uuuu
-000 0000
--01 uuuu
(HALT)
000H