ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 31

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
RS
ZCS1
ZWR
ZRD
DATA[7:0]
RS
ZCS1
ZWR
ZRD
DATA[7:0]
TECHNOLOGY INC.
6-1-3 Memory Write/Read
6-1-4 Status Read
When users want to write data to memory – DDRAM or CGRAM, then a special Command cycle
has to execute first, the register have to assign to “B0h” on Data Bus. Then the following Data Write
cycle will write data into memory. If users want to read data from memory, then the register has to
assign to “B1h” on Data Bus in Command Write cycle. Please see the following Figure 6-6 (1) and
(2).
RA8806 provides a dedicate Status Read cycle to help users know the status of RA8806. Please
refer to following Figure 6-7 and the beginning of Section 5-2 “Register Description”.
B0h
B1h
RS
ZCS1
ZW R
ZRD
DATA [7:0]
Figure 6-6 : Memory Write/Read Cycle
Figure 6-7 : Status Read Cycle
(2) Memory Read (Read Data from DDRAM)
(1) Memory Write (Write Data to DDRAM)
Status Register Read
DATA1
DATA1
31/184
Status DATA
Two Layers Character/Graphic LCD Controller
DATA2
DATA2
www.raio.com.tw
DATAn
DATAn
RA8806