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零件编号 | RC0802A-YHY-CSX | ||
描述 | LCD Module | ||
制造商 | RAYSTAR | ||
LOGO | |||
1 Page
曜凌光電股份有限公司
住址: 42878 台中縣大雅鄉科雅路 25 號 5F WEB: http://www.Raystar-Optronics.com
5F, No.25, keya Rd. Daya Township,
E-mail: [email protected]
Taichung County, Taiwan
Tel:886-4-2565-0761 Fax:886-4-2565-0760
RC0802A-YHY-CSX
CUSTOMER:
SPECIFICATION
APPROVED BY
PCB VERSION
DATE
FOR CUSTOMER USE ONLY
SALES BY
APPROVED BY
CHECKED BY
PREPARED BY
ISSUED DATE:
Page 1 , Total 28 Pages
RC0802A-YHY-CSX
6. Function Description
The LCD display Module is built in a LSI controller, the controller has two 8-bit registers, an
instruction register (IR) and a data register (DR).
The IR stores instruction codes, such as display clear and cursor shift, and address
information for display data RAM (DDRAM) and character generator (CGRAM). The IR can
only be written from the MPU. The DR temporarily stores data to be written or read from
DDRAM or CGRAM. When address information is written into the IR, then data is stored into
the DR from DDRAM or CGRAM. By the register selector (RS) signal, these two registers
can be selected.
RS R/W
Operation
0 0 IR write as an internal operation (display clear, etc.)
0 1 Read busy flag (DB7) and address counter (DB0 to DB7)
1 0 Write data to DDRAM or CGRAM (DR to DDRAM or CGRAM)
1 1 Read data from DDRAM or CGRAM (DDRAM or CGRAM to DR)
Busy Flag (BF)
When the busy flag is 1, the controller LSI is in the internal operation mode, and the next
instruction will not be accepted. When RS=0 and R/W=1, the busy flag is output to DB7.
The next instruction must be written after ensuring that the busy flag is 0.
Address Counter (AC)
The address counter (AC) assigns addresses to both DDRAM and CGRAM.
Display Data RAM (DDRAM)
This DDRAM is used to store the display data represented in 8-bit character codes. Its
extended capacity is 80×8 bits or 80 characters. Below figure is the relationships between
DDRAM addresses and positions on the liquid crystal display.
High bits
Low bits
AC
(hexadecimal)
AC6 AC5 AC4 AC3 AC2 AC1 AC0
Example: DDRAM addresses 4E
1001110
Page 8 , Total 28 Pages
RC0802A-YHY-CSX
Power on
Wait for more than40ms after VDDrises to4.5V
BFcannot be checkedbefore this instruction.
RS R/WDB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Functionset
0 0 0 0 1 1NF * *
Wait for more than39us
BFcannot be checkedbefore this instruction.
RS R/WDB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 0 0 0 1 1NF * *
Function set
Wait for more than37us
RS R/WDB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DisplayON/OFFcontrol
0 0 0 0 0 0 1 BC D
Wait for more than37µs
RS R/WDB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 DisplayClear
0000000001
Wait for more than1.53ms
RS R/WDB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 EntryModeSet
0 0 0 0 0 0 0 1 I/D S
Initialization ends
8-Bit Ineterface
Page 16 , Total 28 Pages
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页数 | 28 页 | ||
下载 | [ RC0802A-YHY-CSX.PDF 数据手册 ] |
零件编号 | 描述 | 制造商 |
RC0802A-YHY-CSX | LCD Module | RAYSTAR |
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