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HT13R90 Datasheet

  • HT13R90

  • 40-Bit Programmable Timer

  • 185.55KB

  • 18頁

  • HOLTEK

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HT13R90
40-Bit Programmable Timer
Features
路
Operating voltage: 2.2V~5.5V
路
Integrated 40-bit programmable timer provides a
路
Dual LED or Buzzer outputs for status indication
路
Adjustable 5% internal RC or 32768Hz crystal
maximum time of over one year
路
3 operating modes: continuous mode, single period
oscillator with quick startup circuit.
路
OTP configuration options of 22麓4 bits for mode
mode and single pulse mode)
路
Single output
setting.
路
8-pin DIP/SOP package
General Description
The HT13R90 is a programmable timer, whose timing is
controlled by a 40bit counter. Providing a long bit coun-
ter enables long timer values of over one year to be pro-
grammed. When added to its other features, which
include multi-preloadable values, varied output wave-
form combinations and OTP configuration option set-
tings, give the device a flexibility making it suitable for a
wide range of product timing applications.
Block Diagram
S T D _ B Y
C T _ S T P
f
S
Y S
/2
~
f
S
Y S
/6 4
T M R 0
T M R 0 _ O V
T M R 0 _ O V /2 ~ T M R 0 _ O V /2 5 6
O S C 2
O S C 1
T im in g
G e n e ra to r
f
S
Y S
6 - B it P r e s c a le r
(P C R 0 )
f
T
7 -1 M U X
M R 0
8 - B it T im e r
(T M R 0 )
1 8 - B it P r e s c a le r
(P C R 1 )
P C R 0 M 0
P C R 0 M 1
P C R 0 M 2
P C R 1 M 0
~
P C R 1 M 4
1 9 -1 M U X
f
T
M R 1
8 - B it T im e r
(T M R 1 )
T M R 1 _ O V
R E S E T
L x _ O p t
O x O P T
S T D _ B Y
C T _ S T P
T M R 0 _ O V /x
2 -1 M u x
( 8 - B it)
T M R 1 A
T M R 1 B
T M R 0 _ O V
T M R 1 _ O V
f
S
Y S
/x
O U
L E
F
C o
lo w
n tro l
D
T &
&
C T _ C L R
L E D 0 /O U T 0
L E D 1 /O U T 1 /B Z
L E D 2 /O U T 2 /B Z
Pin Assignment
L E D 1 /O U T 1 /B Z
1
8
2
7
3
6
4
5
L E D 2 /O U T 2 /B Z
L E D 0 /O U T 0
V S S
R E S E T
O S C 1
O S C 2
V D D
H T 1 3 R 9 0
8 D IP -A /S O P -A
Rev. 1.10
1
July 10, 2007

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