HD66108T00 HITACHI [Hitachi Semiconductor], HD66108T00 Datasheet - Page 40
HD66108T00
Manufacturer Part Number
HD66108T00
Description
(RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics)
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD66108T00.pdf
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9. Multi-Chip Operation
Using multiple HD66108T chips (= multi-chip operation) provides the means for extending the number
of display dots. Note the following items when using the multi-chip operation.
(1) The master chip and the slave chips must be determined; the
(2) All the HD66108T chips will be slave chips if HD61203 or its equivalent is used as a row driver.
(3) The master chip supplies the FLM, CL1, and M signals to the slave chips via the corresponding pins,
(4) Since a master chip outputs synchronization signals, all data registers must be set.
(5) The following bits for slave chips must always be set:
(6) All chips must be set to LCD off in order to turn off the display.
(7) The standby function of slave chips must be started up first while that of the master chip must be
Figure 24 to 26 show the connections of the synchronization signals for different system configurations
and Table 6 lists the differences between master mode and slave mode.
Table 6
Item
Pin:
Register: AR
Notes: Valid:
low and the
which synchronizes the slave chips with the master chip.
INC, WLS, PON, and ROS (control register) FFS (mode register)
It is not necessary to set the control register’s DUTY bits, the mode register’s DWS bits, or the C
select register. For other registers’ settings, refer to Table 6.
terminated first.
Invalid: Needs not be set
OSC1, OSC2
CO
FLM, CL1, M
XAR
YAR
FCR
MDR
CSR
/S
Comparison between Master and Slave Mode
Needs to be set
/S pin of the slave chips must be set high.
Output signals
Valid
Master Mode
Must be set low
Oscillation is possible
= OSC1
Valid
Valid
Valid
Valid
Valid (only if the DWS bits are set for
the C-type waveform)
/S pin of the master chip must be set
Input signals
Slave Mode
Must be set high
Oscillation is possible
= OCS1
Valid
Valid
Valid
Valid except for the DUTY bits
Valid except for the DWS bits
Invalid
HD66108
993
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