EM65168 ELAN Microelectronics Corp, EM65168 Datasheet - Page 14

• Manufacturer Part Number: EM65168
• Description: 80 Com/seg Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

EM65168
80 COM/SEG LCD Driver
10 •
7.2 LCD RAM Read Mode
4-bit bus mode
8-bit bus mode
4-bit bus mode: RAM address is from 000H to address A05H, control register is from
8-bit bus mode: RAM address is from 000H to address 503H, control register is from
When user sets the LCD RAM to “1”, the LCD driver will generate a “light” waveform.
Otherwise, it will generate a “dark” waveform. The LCD RAM area is mapped to
Segment 1 ~ Segment 80. Refer to Fig 7-5, 7-6 and Table 1 to have idea on the LCD
ram mapping. The other RAM (Area 11) is prohibited.
RAM Mapping
RAMEN
RAMADS
RAMD [3:0]
RAMW
RAMR
RAMEN
RAMADS
RAMD [7:0]
RAMW
RAMR
A2 = (x, x, x, x, x, a10, a9, a8)
A1 = (a7, a6, a5, a4, a3, a2, a1, a0)
A3 = (a11, a10, a9, a8)
A2 = (a7, a6, a5, a4)
A1 = (a3, a2, a1, a0)
A00H to A05H
500H to 502H
Tw
Tw
A3
A2
Tdh
Tdh
Fig 7-4 LCD RAM Read Mode for 8-bit Bus
Fig 7-3 LCD RAM Read Mode for 4-bit Bus
A2
(This specification is subject to change without further notice)
A1
A1
RAM enabled
RAM enabled
Product Specification (V1.0) 04.26.2006
Tdv
Tdv
D1
D1
Tdd
Tdd
Tdh
Tdh
D2
D2
D3
D3