參數(shù)資料
型號： HCD66727A03
廠商： Hitachi,Ltd.
英文描述： Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
中文描述： 低功耗點陣液晶顯示控制器/鍵掃描功能驅(qū)動程序
文件頁數(shù)： 15/97頁
文件大?。?/td> 513K
代理商： HCD66727A03
HD66727
15
Block Function Description
System Interface
The HD66727 has two types of system interfaces: I
2
C bus and clock-synchronized serial. The interface
mode is selected by the IM pin.
The HD66727 has two 8-bit registers: an instruction register (IR) and a data register (DR).
The IR stores instruction codes, such as clear display, return home, and display control, and address
information for display data RAM (DDRAM), character generator RAM (CGRAM), and segment RAM
(SEGRAM). The IR can only be written to by MPU and cannot be read from.
The DR temporarily stores data to be written into DDRAM, CGRAM, SEGRAM, or annunciator. Data
written into the DR from the MPU is automatically written into DDRAM, CGRAM, SEGRAM, or
annunciator by an internal operation. The DR is also used for data storage when reading data from
DDRAM, CGRAM, or SEGRAM. When address information is written into the IR, data is read and then
stored into the DR from DDRAM, CGRAM, or SEGRAM by an internal operation. Data transfer between
the MPU is then completed when the MPU reads the DR. After the read, data in DDRAM, CGRAM, or
SEGRAM at the next address is sent to the DR for the next read from the MPU.
These two registers and the operations can be selected by the register select bit (RS) and the read/write bit
(R/W) as listed in Table 4. For details, see the Serial Data Transfer section.
Table 4
Register Selection by RS and R/W Bits
RS Bit
R/W Bit
Operation
0
0
IR write as an internal operation
0
1
Read busy flag (DB7) and key scan data (DB3 to DB0)
1
0
DR write as an internal operation (DR to DDRAM, CGRAM, SEGRAM, or
annunciator)
1
1
DR read as an internal operation (DDRAM, CGRAM, or SEGRAM to DR)
Busy Flag (BF)
When the busy flag is 1, the HD66727 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 from DB7. The next instruction must be
written after ensuring that the busy flag is 0, or data must be transferred in appropriate timing considering
instruction execution times.
相關(guān)PDF資料
PDF描述
HCD66727A03BP Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HCD66727A04 Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HCD66727A04BP Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HCD66730A00 Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
HCD66730A01 Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HCD66727A03BP 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HCD66727A04 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HCD66727A04BP 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function
HCD66730A00 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
HCD66730A01 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display
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