hd66765 Renesas Electronics Corporation., hd66765 Datasheet - Page 22

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

Display Control (R07h)
VLE2–1: When VLE1 = 1, a vertical scroll is performed in the 1st screen. When VLE2 = 1, a vertical
scroll is performed in the 2nd screen. Vertical scrolling on the two screens can be independently
controlled.
SPT: When SPT = 1, the 2-division LCD drive is performed. For details, see the Screen-division Driving
Function section.
REV: Displays all character and graphics display sections with reversal when REV = 1. For details, see
the Reversed Display Function section. Since the grayscale level can be reversed, display of the same
data is enabled on normally-white and normally-black panels.
D1–0: Display is on when D1 = 1 and off when D1 = 0. When off, the display data remains in the
GRAM, and can be displayed instantly by setting D1 = 1. When D1 is 0, the display is off with all of the
SEG/COM pin outputs set to the GND level. Because of this, the HD66765 can control the charging
current for the LCD with AC driving.
When D1–0 = 01, the internal display of the HD66765 is performed although the display is off. When
D1-0 = 00, the internal display operation halts and the display is off.
Table 9
D1
0
0
1
1
Notes: 1. Writing from the microcomputer to the GRAM is independent from D1–0.
Note: SPT and D1 bits are for setting the common driver. Control according to the bits’ values is
R/W
W
D0
0
1
0
1
RS
2. In the sleep and standby modes, D1–0 = 00. However, the register contents of D1–0 are not
executed by the common driver. For details, see the data sheet for the common driver.
1
modified.
D Bits and Operation
DB15
SEG/COM Output
GND
GND
Unlit display
Display
0
DB14
0
DB13
0
DB12
Figure 11 Display Control Instruction
0
DB11
HD66765 Internal Display
Operation
Halt
Operate
Operate
Operate
0
VLE2
DB10
VLE1
DB9
22
SPT
DB8
DB7
0
DB6
0
Master/Slave Signal (CL1,
FLM, M, and DISPTMG)
Halt
Operate
Operate
Operate
DB5
0
DB4
0
DB3
0
REV
DB2
HD66765
DB1
D1
DB0
D0