EM65571AGH EMC [ELAN Microelectronics Corp], EM65571AGH Datasheet - Page 62

• Manufacturer Part Number: EM65571AGH
• Description: 130COM / 128SEG 65K Color STN LCD Driver
• Manufacturer: EMC [ELAN Microelectronics Corp]

EM65571
130COM/128SEG 65K Color STN LCD Driver
56 •
7.28
For the EM65571 to support EEPROM function to tune to the LCD operating voltage Vop,
first, select EEPROM operating mode, EEPROM power from internal or external, and initial
oscillator frequency or faster oscillator frequency (+50%). Select the register (Bank5 [AH]),
using (M1, M0) to select the operating mode for the EEPROM, (M1, M0) = 00 → Read
information from the EEPROM; (M1, M0) = 01 → Program information to the EEPROM;
(M1, M0) = 10 → Erase information on the EEPROM; (M1, M0) = 11 → Reserved.
Secondly, the power supply for the EEPROM is selective. By setting the VPP_EXT control
bit of the register, you can select internal power (from V0) or external power to support the
EEPROM. VPP_EXT=0 → internal power; VPP_EXT=1 → force 16~18V from the VPP
pin externally.
Thirdly, you can select the oscillator frequency by setting the OSC control bit of register.
OSC=0 → initial oscillator frequency setting; OSC=1 → oscillator frequency + 50%.
You can get Vop calibration offset voltage by setting the Vop calibration offset register.
where
where
EEPROM Function
Offset: CV1~CV4 setting
VREF: internal temperature compensation output voltage
N : RM register setting
M: DV register value
(M1, M0)
CV4-CV1
0111
0110
0000
1000
1001
1111
00
01
10
11
…
…
VBA
=
⎡
⎢ ⎣
1
V
+
0
M
(This specification is subject to change without further notice)
=
VBA
+
381
Offset
×
N
Product Specification (V1.0) 08.04.2005
⎤
⎥ ⎦
EEPROM Operating Mode
×
VREF
Calibration Offset
Program
Reserve
Erase
Read
+7
+6
…
…
-8
-7
-1
0