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ST72774 数据表(PDF) 103 Page - STMicroelectronics

部件名 ST72774
功能描述  8-BIT USB MCU FOR MONITORS, WITH UP TO 60K OTP, 1K RAM, ADC, TIMER, SYNC, TMU, PWM/BRM, H/W DDC & I2C
PDF  144 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST72774 数据表(HTML) 103 Page - STMicroelectronics

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Figure 63. DDC1/2B Operation Flowchart
SDA Hi-Z
Vsync Counter = 0
Start 2-sec Timer
N
Y
SCL
N
Received valid
Device Address?
Y
N
Vsync Counter += 1
Counter = 128
or Timer expired ?
Send Next Bit
Relative Address (ALR) = 0
Wait for HWPE = 1
Vsync Counter = 0
Re-Start 2-sec Timer
Y
Y
Y
N
N
HWPE bit = 0
Vsync
SCL
CF0 = 0
Vsync
N
Y
Y
N
Received valid
Device Address?
N
Respond to Command
Send Acknowledge
Y
Relative Address (ALR) = 0
CF2 = 0 ?
and



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