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參數(shù)資料
| 型號： | S-4621A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | CMOS Thermal Print Head Driver Containing a 64-Bit Shift Register and a Latch(內(nèi)置一個64位移位寄存器和一個鎖存器的CMOS 熱敏打印頭驅(qū)動器) |
| 中文描述： | 熱打印頭的CMOS驅(qū)動含64位移位寄存器和鎖存器（內(nèi)置一個64位移位寄存器和一個鎖存器的的CMOS熱敏打印頭驅(qū)動器） |
| 文件頁數(shù)： | 2/6頁 |
| 文件大小： | 75K |
| 代理商： | S-4621A |
64-bit THERMAL HEAD DRIVER
S-4621A
2
Seiko Instruments Inc.
n
Operation
(1) Fundamental Operation
The 64-bit shift register reads the data input to SI at the rising edge of the CLOCK input. Please use HIST in low or
OPEN. The latch circuit operates depending on the levels of CONT and LATCH; it reads the data of the shift register
when teir levels are the same, and it holds the data of the shift register when they differ. The latch data is output to the
respective drivers when AEN is low and BEN is high. The driver output transistor turns ON when the latch data is high
turns OFF when low. Turning AEN high or BEN low makes all driver output transistor go off.
All driver output transistor go off when power supply voltage becomes lower than
V
DET
regardless of all input signals.
(2) Operation of Generating Historical Data
When HIST is high,OLD turns active. The data input to SI and the data input to OLD at the rising edge of the CLOCK
input are read at the shift resister as historical data by using logical circuit.
This is proceeded by AND of logical invert data of input data from OLD and input data from SI.
For example, when the last printed-data input to OLD and the up-data printed-data input to SI, historical data in the
figure2 in the below is read to the shift resister.
Table 1
Pattern 1
Pattern 2
Pattern 3
Pattern 4
the last printed-data(OLD)
l
l
the up-data printed-data(SI)
l
l
the historical data to the shift
resister
l
is HIGH
l
is LOW
this application example is advantage for the preliminary powering-on electricity data of heating elements since when
the last printed-data is
and the up-data printer-data is
l
, the historical data will be
l
.
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