hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 23

• Manufacturer Part Number: hd66765
• Description: 396-channel Segment Driver With Internal Ram For 4096-color Displays - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

COM Driver Interface Control (R0Ah)
IDX2-0: Index bits that select instructions for the common driver. The instruction that corresponds to the
setting made here is transferred, with the index, to the common driver via the serial interface. These
instructions are transferred in bit rows as shown below. The upper 3 bits correspond to IDX2-0. The
IDX2-0 setting at the time of transfer selects the instruction for the common driver as listed below.
To change an instruction setting on the common driver, first change the instruction bit on the HD66765,
select the instruction, which includes the changed instruction bit, from the list below, by setting IDX2-0
as required. The instruction is transferred to the common driver as the transfer starts (TE=1), and is the
executed.
TE: Serial transfer enable for the common driver. When TE=0, serial transfer is possible. Do not change
the instruction during transfer. When TE=1, transfer starts. TE returning to 0 indicates the end of the
transfer. Note that, serial transfer to the common driver requires 18 clock cycles at most. Do not change
the instruction during the transfer.
* New instructions should be transferred to the common driver soon after they have been set on the
HD66765.
R/W
W
R
RS
1
1
DB15
0
0
DB14
0
0
Figure 12 COM Driver Interface Control Instruction
DB13
0
0
DB12
0
0
DB11
0
0
DB10
0
0
DB9
0
0
23
DB8
TE
TE
DB7
0
0
DB6
0
0
DB5
0
0
DB4
0
0
DB3
0
0
IDX2
IDX2
DB2
HD66765
IDX1
IDX1
DB1
IDX0
IDX0
DB0