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參數(shù)資料
| 型號(hào)： | HD66728 |
| 廠商： | Hitachi,Ltd. |
| 英文描述： | 112 x 80-dot Graphics LCD Controller/Driver(112 x 80點(diǎn)圖形LCD控制器) |
| 中文描述： | 112 × 80點(diǎn)圖形LCD控制器/驅(qū)動(dòng)器（112 × 80點(diǎn)圖形液晶顯示控制器） |
| 文件頁(yè)數(shù)： | 62/138頁(yè) |
| 文件大小： | 2158K |
| 代理商： | HD66728 |
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HD66728
62
Serial Data Transfer
Setting the IM1 and IM2 pins (interface mode pins) to the GND level allows standard clock-synchronized
serial data transfer, using the chip select line (CS*), serial data line (SDA), and serial transfer clock line
(SCL). For a serial interface, the IM0/ID pin function uses an ID pin.
The HD66728 initiates serial data transfer by transferring the start byte at the falling edge of CS* input. It
ends serial data transfer at the rising edge of CS* input.
The HD66728 is selected when the 6-bit chip address in the start byte transferred from the transmitting
device matches the 6-bit device identification code assigned to the HD66728. The HD66728, when
selected, receives the subsequent data string. The least significant bit of the identification code can be
determined by the ID pin. The five upper bits must be 01110. Two different chip addresses must be
assigned to a single HD66728 because the seventh bit of the start byte is used as a register select bit (RS):
that is, when RS = 0, an instruction can be issued or key scan data can be read, and when RS = 1, data can
be written to or read from RAM. Read or write is selected according to the eighth bit of the start byte (R/W
bit) as shown in table 26.
After receiving the start byte, the HD66728 receives or transmits the subsequent data byte-by-byte. The
data is transferred with the MSB first. To transfer data consecutively, note that only the display-clear
instruction requires a longer execution time than the others (see table 24, Instruction List).
Two bytes of RAM read data after the start byte are invalid. The HD66728 starts to read correct RAM data
from the third byte.
Write a dummy instruction (00H) before the key scan data is read.
Table 25
Start Byte Format
Transfer Bit
S
1
2
3
4
5
6
7
8
Start byte format
Transfer start
Device ID code
RS
R/W
0
1
1
1
0
ID
Note:
ID bit is selected by the IM0/ID pin.
Table 26
RS and R/W Bit Function
RS
R/W
Function
0
0
Writes instruction
0
1
Reads key scan data
1
0
Writes RAM data
1
1
Reads RAM data
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HD66730 | Dot-Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器) |
| HD66731 | Dot-Matrix Liquid Crystal Display Controller/Driver(點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器) |
| HD66731A00TB0L | 122 x 32 pixel format, Compact LCD size |
| HD66731A00TA0L | Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
| HD66731A01TA0L | 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 |
|---|---|
| HD66729 | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions |
| HD66730 | 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 |
| HD66730A00FS | 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 |
| HD66730A01FS | 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 |
| HD66731 | 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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