hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 15

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

Instruction Descriptions
Index
The index instruction specifies the RAM control indexes (R00h to R37h). It sets the register number in
the range of 00000 to 110111 in binary form. However, R40 to R44 are disabled since they are test
registers.
Status Read
The status read instruction reads the internal status of the HD66765.
L7–0: Indicate the driving raster-row position where the liquid crystal display is being driven.
C6–0: Read the contrast setting values (CT6–0).
Start Oscillation (R00h)
The start oscillation instruction restarts the oscillator from the halt state in the standby mode. After
issuing this instruction, wait at least 10 ms for oscillation to stabilize before issuing the next instruction.
(See the Standby Mode section.)
If this register is read forcibly, *765H is read.
R/W
R/W
R/W
W
W
R
R
RS
RS
RS
0
0
1
1
DB15
DB15
DB15
L7
0
*
*
DB14
DB14
DB14
L6
0
*
*
DB13
DB13
DB13
L5
0
*
*
DB12
DB12
DB12
Figure 3 Start Oscillation Instruction
L4
0
*
*
Figure 2 Status Read Instruction
DB11
DB11
DB11
Figure 1 Index Instruction
L3
0
*
*
DB10
DB10
DB10
L2
1
*
*
DB9
DB9
DB9
L1
1
*
*
15
DB8
DB8
DB8
L0
1
*
*
DB7
DB7
DB7
0
0
*
*
ID6
DB6
DB6
DB6
C6
1
*
DB5
ID5
DB5
DB5
C5
1
*
DB4
ID4
DB4
DB4
C4
0
*
ID3
DB3
DB3
DB3
C3
0
*
ID2
DB2
DB2
DB2
C2
1
*
HD66765
ID1
DB1
DB1
DB1
C1
0
*
DB0
ID0
DB0
DB0
C0
1
1