參數(shù)資料
型號： NT68275
廠商： Electronic Theatre Controls, Inc.
英文描述： IIC Bus Controlled On-Screen Display
中文描述： IIC總線控制屏幕顯示
文件頁數(shù)： 26/38頁
文件大小： 1389K
代理商： NT68275
NT68275
26
Read Operation of the Control Registers:
Not all control registers can be read out by the master via IIC bus of READ mode. Bellow listed, after the proper
identification of slave address ($7B) by the NT68275, 1 byte data train is transmitted to the master.
Item
Register
Bytes
1
Row 15 Column 23 Control Register
1
IIC Bus Read Operation Timing:
Figure 7. Access Register Read Operation
3
---- 1 bytes data ----
4
(3)
Row15 Column 23
Data
8 bits
Type
(1)
START
Condition
(2)
(4)
STOP
Condition
(a)
OSD Slave
Address ‘$7B’
8 bits
User must read these bytes of data sequentially and can abort transmission by sending NAK (no acknowledge),
Repeat START condition or STOP condition. Every time user sends the START condition (including Repeat START)
and slave address $7B, the NT68275 will respond ACK and then transmit first byte (content of row 15 column 23
register). It is prohibited to read more than 1 byte of data.
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