ASM3I2508AF-08SR PULSECORE [PulseCore Semiconductor], ASM3I2508AF-08SR Datasheet - Page 5

• Manufacturer Part Number: ASM3I2508AF-08SR
• Description: Peak EMI Reducing Solution
• Manufacturer: PULSECORE [PulseCore Semiconductor]

February 2007
rev 1.4
I2C Serial Interface Information
The information in this section assumes familiarity with I2C programming.
How to program ASM3P2508A through I2C:
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Master (host) sends a start bit.
Master (host) sends the write address D4 (H).
ASM3P2508A device will acknowledge.
Master (host) sends the beginning byte location
(N = 0, 1).
ASM3P2508A device will acknowledge.
Master (host) sends a byte count (X = 1,2)
ASM3P2508A device will acknowledge.
Master (host) starts sending byte N through byte
(N+X – 1)
ASM3P2508A device will acknowledge each byte one
at a time.
Master (host) sends a Stop bit.
Start Bit
Slave Address D4(H)
Beginning byte location (=N)
Byte count (=X)
Beginning byte (Byte N)
Next Byte (Byte N+1)
-------
Last Byte (Byte N+X-1)
Stop Bit
Controller (Host)
Notice: The information in this document is subject to change without notice.
(slave/receiver)
ASM3P2508A
ACK
ACK
ACK
ACK
ACK
ACK
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Peak EMI Reducing Solution
How to Read from ASM3P2508A through I2C:
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Start Bit
Slave Address D4(H)
Beginning Byte = N
Repeat start
Slave address D5(H)
ACK
ACK
ACK
Not Acknowledge
Stop Bit
Controller (Host)
Master (host) will send start bit.
Master (host) sends the write address D4 (H).
ASM3P2508A device will acknowledge.
Master (host) sends the beginning byte location
(N = 0, 1).
ASM3P2508A device will acknowledge.
Master (host) will send a separate start bit.
Master (host) sends the read address D5 (H).
ASM3P2508A device will acknowledge.
ASM3P2508A device will send the byte count
(X = 1, 2).
Master (host) acknowledges.
ASM3P2508A device sends byte N through byte
(N+X – 1).
Master (host) will need to acknowledge each byte.
Master (host) will send a stop bit.
-------
ACK
ACK
ACK
Byte Count (= X)
Beginning byte N
Next Byte N+1
Last Byte (Byte N+X-1)
(slave/receiver)
ASM3P2508A
ASM3P2508A
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