HT13R90 Datasheet, PDF (1/18 Pages) Holtek Semiconductor Inc – 40-Bit Programmable Timer

HT13R90
40-Bit Programmable Timer
Features
· Operating voltage: 2.2V~5.5V
· Integrated 40-bit programmable timer provides a
maximum time of over one year
· 3 operating modes: continuous mode, single period
mode and single pulse mode)
· Single output
· Dual LED or Buzzer outputs for status indication
· Adjustable 5% internal RC or 32768Hz crystal
oscillator with quick startup circuit.
· OTP configuration options of 22´4 bits for mode
setting.
· 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 TD _B Y
C T_S TP
O SC2
O SC1
T im in g
fS Y S
G e n e ra to r
P C R 0M 0
P C R 0M 1
P C R 0M 2
fS Y S /2 ~ fS Y S /6 4
6 - B it P r e s c a le r
(P C R 0 )
7 -1 M U X
TM R 0
T M R 0 _ O V /2 ~ T M R 0 _ O V /2 5 6
TM R 0_O V
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 )
fT M R 0
P C R 1M 0
~
P C R 1M 4
1 9 -1 M U X
8 - B it T im e r
TM R 1_O V
fT M R 1
(T M R 1 )
2 -1 M u x
( 8 - B it)
TM R 1A
TM R 1B
RESET
Lx_O pt
O xO P T
T M R 0 _ O V /x
fS Y S /x
TM R 0_O V
TM R 1_O V
OUT &
LE D &
F lo w
C o n tro l
S TD _B Y
C T_S TP
C T_C LR
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
L E D 2 /O U T 2 /B Z
L E D 0 /O U T 0
VSS
1
8 RESET
2
7 O SC1
3
6 O SC2
4
5 VDD
H T13R 90
8 D IP -A /S O P -A
Rev. 1.10
1
July 10, 2007