HT47C20 Holtek Semiconductor Inc, HT47C20 Datasheet - Page 20

• Manufacturer Part Number: HT47C20
• Description: 8-Bit Microcontroller
• Manufacturer: Holtek Semiconductor Inc

The states of the registers are summarized in the following table:
Note: ²*² refers to ²warm reset²
Register
STATUS
Program
TMRAH
TMRBH
Counter
TMRAL
TMRBL
INTC0
INTC1
TMRC
ADCR
TBLH
RTCC
TBLP
MP0
MP1
ACC
PA
²u² means ²unchanged²
²x² means ²unknown²
(power on)
1111 1111
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
-000 0000
1xxx --00
xxxx xxxx
--x0 0111
--00 xxxx
0000 1---
---0 ---0
Reset
000H
Reset circuit
WDT time-out
operation)
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
1111 1111
--1u uuuu
-000 0000
1xxx --00
--x0 0111
(normal
0000 1---
---0 ---0
000H
20
operation)
RES reset
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
1111 1111
--uu uuuu
-000 0000
1xxx --00
--x0 0111
(normal
0000 1---
---0 ---0
000H
Reset configuration
RES reset
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
1111 1111
--01 uuuu
-000 0000
1xxx --00
--x0 0111
0000 1---
(HALT)
---0 ---0
000H
January 18, 2000
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
uuuu uuuu
-uuu uuuu
uuuu uuuu
uuuu --uu
--uu uuuu
--11 uuuu
time-out
uuuu u---
HT47C20
(HALT)
---u ---u
000H*
WDT