HT49R50A-1 View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT49R50A-1' PDF : 45 Pages View PDF
HT49R50A-1/HT49C50-1/HT49C50L
The functional unit chip reset status is shown below.
Program Counter 000H
Interrupt
Disabled
Prescaler, Divider Cleared
WDT, RTC,
Time base
Cleared. After master reset,
WDT starts counting
Timer/Event Counter Off
Input/output ports Input mode
Stack Pointer
Points to the top of the stack
H A LT
W DT
RES
W DT
T im e - o u t
R eset
O SC1
SST
1 0 - b it R ip p le
C o u n te r
E x te rn a l
W a rm R e s e t
C o ld
R eset
P o w e r - o n D e te c tio n
Reset Configuration
V DD
100kW
0 .1 m F
RES
B a s ic
R eset
C ir c u it
V DD
0 .0 1 m F
100kW
10kW
0 .1 m F
RES
H i-n o is e
R eset
C ir c u it
Reset Circuit
Note: Most applications can use the Basic Reset Circuit
as shown, however for applications with extensive noise,
it is recommended to use the Hi-noise Reset Circuit.
VDD
RES
S S T T im e - o u t
C h ip R e s e t
tS S T
Reset Timing Chart
The states of the registers are summarized below:
Register
Reset
WDT Time-out
RES Reset
(Power On) (Normal Operation) (Normal Operation)
TMR0
xxxx xxxx
xxxx xxxx
xxxx xxxx
TMR0C
0000 1---
0000 1---
0000 1---
TMR1
xxxx xxxx
xxxx xxxx
xxxx xxxx
TMR1C
0000 1---
0000 1---
0000 1---
Program Counter
000H
000H
000H
MP0
xxxx xxxx
uuuu uuuu
uuuu uuuu
MP1
xxxx xxxx
uuuu uuuu
uuuu uuuu
BP
---- ---0
---- ---0
---- ---0
ACC
xxxx xxxx
uuuu uuuu
uuuu uuuu
TBLP
xxxx xxxx
uuuu uuuu
uuuu uuuu
TBLH
-xxx xxxx
-uuu uuuu
-uuu uuuu
STATUS
--00 xxxx
--1u uuuu
--uu uuuu
INTC0
-000 0000
-000 0000
-000 0000
INTC1
-000 -000
-000 -000
-000 -000
RTCC
--00 0111
--00 0111
--00 0111
PA
1111 1111
1111 1111
1111 1111
PB
xxxx xxxx
xxxx xxxx
xxxx xxxx
PC
---- 1111
---- 1111
---- 1111
RES Reset
(HALT)
xxxx xxxx
0000 1---
xxxx xxxx
0000 1---
000H
uuuu uuuu
uuuu uuuu
---- ---0
uuuu uuuu
uuuu uuuu
-uuu uuuu
--01 uuuu
-000 0000
-000 -000
--00 0111
1111 1111
xxxx xxxx
---- 1111
Note:
²*² refers to warm reset
²u² means unchanged
²x² means unknown
WDT Time-out
(HALT)*
uuuu uuuu
uuuu u---
uuuu uuuu
uuuu u---
000H
uuuu uuuu
uuuu uuuu
---- ---u
uuuu uuuu
uuuu uuuu
-uuu uuuu
--11 uuuu
-uuu uuuu
-uuu -uuu
--uu uuuu
uuuu uuuu
uuuu uuuu
---- uuuu
Rev. 2.40
16
July 30, 2012
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