hd66503 Renesas Electronics Corporation., hd66503 Datasheet - Page 9

• Manufacturer Part Number: hd66503
• Description: 240-channel Common Driver With Internal Lcd Timing Circuit - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

1. CR Oscillator: The CR oscillator generates the HD66503 operation clock. During master mode, since
2. Liquid Crystal Timing Generator: The liquid crystal timing generator creates various signals for the
3. M/
4. Alternating Signal Generator: Generates the alternating signal for the liquid crystal display. Since
the operation clock is needed, connect oscillation resistor R
When the external clock is used, input external clock to pin CR and open pins C and R (Figure 4).
When using the HD66503 during slave mode, the operation clock will not be needed; therefore,
connect pin CR to V
the alternating signal decreases cross talk, it can alternate among 2 to 63 lines. The number of lines
are specified with pins MWS0 to MWS5 is set to either V
Moreover, the alternating signal can be externally input by grounding pins MWS0 to MWS5. In this
case, the alternating signal is input from pin M.
LCD. During master mode (M/
common internal driver using the generated LCD signals. In addition, signals CL1, M, and
created by this generator can synchronously display data on a liquid crystal display by inputting them
into the RAM-provided segment driver HD66520 used together with HD66503. During slave mode
(M/
FLM generated by the master HD66503.
This circuit outputs data when M/
mode).
$ $
6
Switcher: Controls the input and output of LCD signals CL1, FLM, M, and
= GND), this generator stops; the slave HD66503 operates based on signals CL1, M,
CC
and open pins C and R (Figure 5).
Figure 4 Oscillator Connection in Master Mode
Figure 5 Oscillator Connection in Slave Mode
OPEN
C
6
OPEN
= V
6
R
= V
CC
), the generator operates the HD66503’s internal circuitry as a
CR
CC
(master mode) and inputs data when M/
OPEN
External clock
C
OPEN
R
V
CR
CC
CC
C
f
or GND.
with oscillation capacitor C
C
f
R
R
f
CR
'2&
6
= GND (slave
.
f
HD66503
as follows.
'2&
'2&
, and
935