- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370444 > HCD66727A04 (Hitachi,Ltd.) Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function PDF資料下載
參數(shù)資料
| 型號(hào)： | HCD66727A04 |
| 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(diǎn)陣液晶顯示控制器/鍵掃描功能驅(qū)動(dòng)程序 |
| 文件頁數(shù)： | 46/97頁 |
| 文件大?。?/td> | 513K |
| 代理商： | HCD66727A04 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁當(dāng)前第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁
HD66727
46
Serial Data Transfer
I
2
C Bus Interface
Grounding the IM pin (interface mode pin) allows serial data transfer conforming to the I
2
C bus interface
using the serial data line (SDA) and serial transfer clock line (SCL). Here, the HD66727 operates in an
transmit/receive slave mode.
The HD66727 initiates serial data transfer by transferring the first byte when a high SCL level at the falling
edge of the SDA input is sampled; it ends serial data transfer when a high SCL level at the rising edge of
the SDA input is sampled.
Table 24 illustrates the first bytes of I
2
C bus interface data and Figure 23 shows the I
2
C bus interface timing
sequence.
The HD66727 is selected when the higher six bits of the 7-bit slave address in the first byte transferred
from the master device match the 6-bit device identification code assigned to the HD66727. The HD66727,
when selected, receives the subsequent data string. The lower bits of the identification code can be
determined by the ID1 and ID0 pins; select an appropriate code that is not assigned to any other slave
device. The upper four bits is fixed to 0111. Two different slave addresses must be assigned to a single
HD66727 because the least significant bit (LSB) of the slave address is used as a register select bit (RS):
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 first byte (R/W
bit) as shown in Table 25.
The ninth bit of the first byte is a receive-data acknowledge bit (ACK). When the received slave address
matches the device ID code, the HD66727 pulls down the ACK bit to a low level. Therefore, the ACK
output buffer is an open-drain structure, only allowing low-level output. However, the ACK bit is
undetermined immediately after power-on; make sure to initialize the LSI using the RESET* input.
After identifying the address in the first byte, the HD66727 receives the subsequent data as an HD66727
instruction or as RAM data, or transmits key scan data or RAM data. Having received or transmitted 8-bit
data normally, the HD66727 pulls down the ninth bit (ACK) to a low level. Therefore, if the ACK is not
returned, the data must be transferred again. Multiple bytes of data can be consecutively transferred until
the transfer-end condition is satisfied. Here, when the serial data transfer rate is longer than the HD66727
instruction execution time, effective data transfer is possible without retransmission (see Table 23,
Instruction List). Note that the display clear instruction alone requires longer execution time than the
others.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| HCD66731A00BP | Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display |
| HCD66731A01BP | 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 |
|---|---|
| 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 |
| HCD66731A00BP | 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 |
| HCD66731A01BP | 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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。