HD66108T00 HITACHI [Hitachi Semiconductor], HD66108T00 Datasheet - Page 46

• Manufacturer Part Number: HD66108T00
• Description: (RAM-Provided 165-Channel LCD Driver for Liquid Crystal Dot Matrix Graphics)
• Manufacturer: HITACHI [Hitachi Semiconductor]

5. Control Register (FCR) (Accessed with RS = 1, Register Number = (B’011)
This register (Figure 31), containing eight bits, has a variety of functions such as specifying the method
for accessing RAM, determining RAM valid area, and selecting the function of the LCD driving signal
output pins. It must be initialized as soon as possible after power-on since it determines the overall
operation of the HD66108T. The PON bit may have to be reset afterwards. If the DUTY bits are rewritten
after initialization at power-on (if values other than the initial values are desired), the display memory
will not preserve data; the display memory must be set again after a time period of t
determining t
CL1
, refer to equation 1 (Section 3.1).
(1)
(2)
(3)
(4)
(5) DUTY (multiplexing duty ratio)
INC
D7
INC (address increment direction select)
1: X address is incremented
0: Y address is incremented
WLS (word length (of display data) select)
1: 6-bit word
0: 8-bit word
PON (row data protect on)
1: Protect function on
0: Protect function off
ROS (row output (function of LCD driving output pins) select)
No.
0
1
2
3
No.
0
1
2
3
4
5
6
7
WLS
D6
Figure 31 Control Register
4 3
0
0
1
1
2 1
0
0
0
0
1
1
1
1
Bit
Bit
0
1
0
1
0
0
1
1
0
0
1
1
PON
D5
0
0
1
0
1
0
1
0
1
Contents
165 column outputs
65 row outputs from the right side
65 row outputs from the left and right sides
33 row outputs from the right side
D4
Multiplexing
Duty Ratio
1/32
1/34
1/36
1/48
1/50
1/64
1/66
Invalid (testing mode)
ROS
D3
D2
DUTY
D1
D0
CL1
or longer. For
HD66108
999