參數(shù)資料
型號(hào)： HD66712UA02TA0
廠商： Hitachi,Ltd.
英文描述： Dot-Matrix Liquid Crystal Display Controller/Driver
中文描述： 點(diǎn)陣液晶顯示控制器/驅(qū)動(dòng)器
文件頁數(shù)： 37/88頁
文件大?。?/td> 662K
代理商： HD66712UA02TA0
HD66712U
400
Transferring Serial Data
When the IM pin (interface mode) is low, the HD66712 enters serial interface mode. A three-line clock-
synchronous transfer method is used. The HD66712 receives serial input data (SID) and transmits serial
output data (SOD) by synchronizing with a transfer clock (SCLK) sent from the master side.
When the HD66712 interfaces with several chips, chip select pin (CS*) must be used. The transfer clock
(SCLK) input is activated by making chip select (CS*) low. In addition, the transfer counter of the
HD66712 can be reset and serial transfer synchronized by making chip select (CS*) high.
Here, since the data which was being sent at reset is cleared, restart the transfer from the first bit of this
data. In the case of a minimum 1 to 1 transfer system with the HD66712 used as a receiver only, an
interface can be established by the transfer clock (SCLK) and serial input data (SID). In this case, chip
select (CS*) should be fixed to low.
The transfer clock (SCLK) is independent from operational clock (CLK) of the HD66712. However,
when several instructions are continuously transferred, the instruction execution time determined by the
operational clock (CLK) (see continuous transfer) must be considered since the HD66712 does not have
an internal transmit/receive buffer.
To begin with, transfer the start byte. By receiving five consecutive bits (synchronizing bit string) at the
beginning of the start byte, the transfer counter of the HD66712 is reset and serial transfer is
synchronized. The 2 bits following the synchronizing bit string (5 bits) specify transfer direction (R/
:
bit) and register select (RS bit). Be sure to transfer 0 in the 8th bit.
After receiving the start byte, instructions are received and the data/busy flag is transmitted. When the
transfer direction and register select remain the same, data can be continuously transmitted or received.
The transfer protocol is described in detail below.
Receiving (write)
After receiving the start synchronization bits, the R/
:
bit (= 0), and the RS bit with the start byte, an
8-bit instruction is received in 2 bytes: the lower 4 bits of the instruction are placed in the LSB of the
first byte, and the higher 4 bits of the instruction are placed in the LSB of the second byte. Be sure to
transfer 0 in the following 4 bits of each byte. When instructions are continuously received with R/
:
bit and RS bit unchanged, continuous transfer is possible (see “Continuous Transfer” below).
相關(guān)PDF資料
PDF描述
HD66712SA00FS Dot-Matrix Liquid Crystal Display Controller/Driver
HD66712SA01FS Dot-Matrix Liquid Crystal Display Controller/Driver
HD66712SA02FS Dot-Matrix Liquid Crystal Display Controller/Driver
HD66712UA03TA0 Dot-Matrix Liquid Crystal Display Controller/Driver
HD66717 (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD66712UA03TA0 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot-Matrix Liquid Crystal Display Controller/Driver
HD66717 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
HD66717A03TA0 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:(Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)
HD66720 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
HD66720A01TF 制造商:未知廠家 制造商全稱:未知廠家 功能描述:LCD Display Driver
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