em65567 ELAN Microelectronics Corp, em65567 Datasheet - Page 57

• Manufacturer Part Number: em65567
• Description: Com/ Color Driver
• Manufacturer: ELAN Microelectronics Corp

8.2.9 Display Control (2) Register
(At the tine of reset: {REV, NLIN, SWAP, REF}=0H, read address: 9H)
Various control of display is set up.
REF
When MPU accesses to display RAM, the X address and data can reverse. The REF function shows in the table below: The
order of segment driver output can be reversed by register by register setting, lessening the limitation in placing IC when
assembling a LCD module.
Note: maxH: The maximum X-address in each access mode.
SWAP
When data to display RAM are written, the write data exchange bit order.
SWAP = “0”: Normal mode. In data writing, the data either of D7 to D0 or D15 to D0can be written to the display RAM.
SWAP = “1”: SWAP mode ON. In data writing the swapped data either of D7 to D0 or of D15 to D0 can be written to display
RAM.
Example of exchange bit order
CAUTION: REF and SWAP both set to “1”
When data write to display RAM, the write data is normal bit order.
When data read from display RAM, the read data is exchanged bit order.
NLIN
The NLIN control n-line alternated drive.
NLIN = “0”: n-line alternated drive OFF. In each frame, the alternated signals (M) are reversed.
NLIN =”1”: n-line alternated drive ON. According to data set up in n-line alternated register, the alternation is made.
* This specification is subject to be changed without notice.
Internal Data d7 d6 d5 d4 d3 d2 d1 d0 d0 d1 d2 d3 d4 d5 d6 d7
Write Data
D7
REF
1
0
1
D6
0
X Address
NH
NH
Access from MPU
D5
0
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
D4
1
D7(MSB)
D7(MSB)
D0(LSB)
D0(LSB)
SWAP = "0"
D7-D0
REV NLIN SWA REF
D3
：
：
D2
maxH-NH
X Address
D1
NH
Internal Access
D0
D7-D0
(MSB)
(MSB)
(LSB)
(LSB)
：
：
CSB
0
57
66 COM/ 96 SEG 256 Color STN LCD Driver
SWAP = "1"
RS
1
SEG(8*(maxH-NH)+7)Output
SEG(8*(maxH-NH))Output
RDB WRB RE2
SEG(8*NH+7)Output
1
SEG(8*NH)Output
Segment Output
Corresponding
0
：
：
0
RE1
0
RE0
0
2003/1/9 (V0.1)
EM65567