cxa3562r Sony Electronics, cxa3562r Datasheet - Page 11

• Manufacturer Part Number: cxa3562r
• Description: Lcd Driver
• Manufacturer: Sony Electronics

Description of Operation
The flow of internal operations is described below.
The digital signals input to D_A9 to D_A0 and D_B9 to D_B0 are internally D/A converted into approximately
1.5V (at VREF_I: 3.2V) analog signals. After that, the signal that has been demultiplexed into 12 phases is
amplified by a factor of three times, inverted at the signal center potential according to FRP , and output.
The output level relative to the digital input changes according to the following settings.
1. Digital input block
The CXA3562R can be set to single input from only the A port or parallel input from both the A and B ports,
and port switching by right/left inversion is also possible in parallel input mode. This makes it possible to
support various systems.
In single input mode, the signal is internally demultiplexed to 2-parallel format and input to the D/A converter.
2. D/A converter block
The internal D/A converter has two systems for odd-numbered and even-numbered outputs. The voltage input
from VREF_I becomes the 100% white level potential of the analog converted signal, and this amplitude is a
maximum 1.5Vp-p with respect to input data of 000h to 3FFh.
3. Sample-and-hold (S/H) block
The odd-numbered and even-numbered D/A converter outputs are input to the odd-numbered and even-
numbered sample-and-hold blocks, respectively. The signals are converted from time series signals into 6-phase
cyclic parallel signals by the sample-and-hold group which is appropriately controlled by the internal timing
generator. For forward scan, the signals are output in the ascending order of SH_OUT1, SH_OUT2, SH_OUT3
... SH_OUT12. For reverse scan, this order is inverted and the signals are output in descending order. Connect
the signals to the LCD panel according to the order used. The timing of each sample-and-hold pulse is shown
on the following pages. These pulses are not output and are used only inside the IC.
A: SIG_OFST voltage
B: VREF_I voltage
C: SIG.C voltage
1023
512
0
Digital IN
– 11 –
SH_OUT
B
A
A
B
C
Signal Center
V
CC
GND
CXA3562R