EM65571 ELAN Microelectronics Corp, EM65571 Datasheet - Page 26

• Manufacturer Part Number: EM65571
• Description: 130com / 128seg 65k Color Stn Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

EM65571
130COM/128SEG 65K Color STN LCD Driver
20 x
7.2 Data Write to Display RAM and Control Register
7.3 Internal Register Read
CSB
SDA
SCL
(D0~D15)
procedure, only different settings of RS that select access to the object.
RS = “L”: Display RAM data
RS = “H”: Control register data
the case of the 68-family MPU, the data is written at the falling edge of signal E.
Data Write Operation
time. The designated address data is not output to read operation immediately
after the address is set to AX or AY register, but is output when the second data is
read. Dummy read is always required one time after an address set and write
cycle.
The data write to display RAM and Control Register use almost the same
In the case of the 80-family MPU, the data is written at the rising edge of WRB. In
In the case of display RAM read operation, you need to perform a dummy read one
Read Display RAM Operation
D0~D7
Destination
WRB
RDB
(D0~D15)
RS
D0~D7
WRB
Write
RS
1
RS
Address set (AX,AY)
Address = n
D7
2
n
Write to Control Register
Data0
Figure 5. 3-wire Type Serial Interface
Figure 7. Read Display RAM Operation
D6
3
Figure 6. Data Write Operation
Dummy
***
Read
Data1
D5
4
(This specification is subject to change without further notice)
Data Read
Address=n
D4
5
n
Data2
Product Specification (V1.0) 08.04.2005
D3
6
Address=n+1
Data Read
n+1
Data3
7
D2
Write to Display RAM
Address=n+2
Data Read
n+2
8
D1
Data4
D0
9