UPD161622 NEC, UPD161622 Datasheet - Page 29

• Manufacturer Part Number: UPD161622
• Description: 396 OUTPUT TFT-LCD SOURCE DRIVER
• Manufacturer: NEC

www.DataSheet4U.com
5.3 Oscillator
CR oscillator is selected. Leave both OSC
Connect 51 k
display driving. Frame frequency calibration is set by calibration register (R45). The time to select one line is set by
the calibration start and stop commands.
signals and storing that number in a register. The number of oscillation clocks is then continually compared with this
register value in subsequent operations, and the time of the clock number stored in the register is set as 1 line
selection time, and used as the internal reference clock.
The
This oscillator also has a calibration function, which is available by itself to set the number of frame frequency of
The calibration function involves counting the number of oscillation clocks generated between the start and stop
Using the time to set calibration (t
OSC1
OSC2
PD161622 has a CR oscillator (with external R), which generate the display clock. When R
resistance between OSC
Calibration start
OSC
Calibration
command
1
1
Figure 5–14. Calibration Function Timing (LTS [R1] = 0)
2
cal
Figure 5–13. Frame Frequency Calibration
) can be selected either t
IN
3
Start/Stop
2
t
cal
IN
and OCS
(1 line time)
pin and OSC
Data Sheet S15649EJ2V0DS
4
OUT
3
pin.
5
OUT
Register
n-bit
counter
open. When R
cal
or t
6
4
cal
Calibration stop
x 2 through control register (R1): LTS.
7
SEL
is H, an external oscillator is selected.
t
f
n: Line numbers
cal
FRAME
= 1/(f
Internal
clock
= Frame frequency
FRAME
SEL
x n)
is L, an internal
PD161622
29