HT6750A Datasheet, PDF (1/8 Pages) Holtek Semiconductor Inc – Date Printer

HT6750A
Date Printer
Features
· Operating voltage: 2.4V~5.5V
· Operating current: < 3mA at 3.0V
· Constant voltage output (1.8V±5%) at 2.4V~5.5V
operating for driving lamp (1.8V/40mA)
· LCD contrast can not distort at 2.4V~5.5V operating
· LCD display drive 1/3 duty, 1/2 bias, frame frequency
is 42.67Hz
· At power interrupt, data hold up > 1.0s
(between V_DD and V_SS connect a 0.1mF capacitor)
· Built-in power on reset function
· 32K crystal oscillator (Internal capacitor and resistor)
· Calendar and time adjustment
· Date imprinting modes
(Y/M/D, D/H/Min, Imprint off, M/D/Y, D/M/Y)
· Mode is selected by cyclically turning
· 4 film printing times is selectable or external input
control (30ms/45ms/60ms/external control)
· Direct resetting system
· Lamp output time control
· Provides module test circuit
General Description
The 6-Digital Timer is a camera data optical printer. Dis-
playing and printing of data (Year Month Day/Day Hour:
Minute/OFF/Month Day Year/Day Month Year) can be
selected by mode selection. Date updating is a fully au-
tomatic calendar from the year 1998.1.1 to 2049.12.31.
Block Diagram
C O M 1~C O M 3 TE S T2
O SCI
O SCO
O s c illa to r
D iv . 3 2 K
D iv . 6 0
D iv . 6 0
SEG O N
RESET
M ODE
SEL
SET
V.2
V.4
LC 1
LC 2
T
D
X
C o n tro l
C ir c u it
P r in t/L a m p
C o n tro l
D iv . 3 2 K
D iv . 2 8 , 2 9 ,
30 or31
D iv . 2 4
VDD
VSS
Y ear
C o u n te r
M UX
M UX
M UX
Im - P r in t M a r k L a m p
SEG 1
S E G 15
Rev. 1.00
1
January 17, 2003