參數(shù)資料
型號: HI-8010
廠商: Holt Integrated Circuits
英文描述: CMOS HIGH VOLTAGE DISPLAY DRIVER
中文描述: CMOS高壓顯示驅(qū)動程序
文件頁數(shù): 2/8頁
文件大小: 380K
代理商: HI-8010
FUNCTIONAL DESCRIPTION
Whenever a Logic "0" is applied to the Chip Select (
input,one bitofdataisclockedintotheshiftregisterfromthe
serial data input (DIN) with each negative transition of the
Clock (
) input.
is internally tied to VSS on some
versions. A Logic "1" present at the Load (LD) input will
cause a parallel transfer of data from the shift register to the
data latch. If the Load (LD) input is held high while data is
clocked into the shift register, the latch will be transparent.
All four logic inputs are TTL compatible on the HI-8010 and
CMOScompatibleontheHI-8110.
)
To display segments, a Logic "1" is stored in the appropriate
shift register bit position, and the segment output is out-of-
phasewiththebackplane.
The backplane output functions in 1 of 2 modes; externally
drivenorself-oscillating. WhentheLCDinputisexternally
driven with the LCDOPT input open circuit (Figure 2), the
backplane output will be in-phase with LCD. Utilizing the
self-oscillating mode, inputs LCD and LCDOPT are tied
together and connected to an RC circuit (Figure 3).
A 150K
resistor with a 470pF capacitor generates an
approximate backplane frequency of 100Hz. The
LCD/LCDOPT oscillator frequency is divided by 256 to
determine the backplane output frequency.
value (R) must be at least 30K
operation.
The resistor
for proper self-oscillator
For displays having a number of segments greater than 38,
twoormoreofthedisplaydriversmaybecascadedtogether
by connecting the serial data output (DOUT) from the first
driver, to the serial data input (DIN) of the following driver,
etc. (See Figures 2 & 3). Data out (DOUT) will change state
CS
CL
CS
HI-8010/HI-8110 Series
TIMING DIAGRAM
t
CSH
t
CSS
t
DS
t
DH
t
CL
t
CDO
t
LS
t
LW
t
CSL
t
LCS
CL
INPUT
DIN
INPUT
CS
INPUT
LD
INPUT
DOUT
OUTPUT
VALID
VALID
INTERNAL OSCILLATOR CIRCUIT
TO BACKPLANE
TRANSLATOR
AND DRIVER
÷ 256
LCD
OPT
LCD
Figure 1
Q
on the rising edge of the Clock (
and Chip Select (
other,respectively,betweenallcascadeddisplaydrivers.
). Clock (
), Load (LD)
) should be tied in common with each
CS
CL
CL
HOLT INTEGRATED CIRCUITS
3-4
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