Byte transfer

SDA

SCL

1

3

4

5

6

7

8

ack

2

• Byte followed by a 1 bit acknowledge from receiver

• Open-collector wires

  • sender allows SDA to rise
  • receiver pulls low to acknowledge after 8 bits

• Multi-byte transfers

  • first byte contains address of receiver
  • all devices check address to determine if following data is for them
  • second byte usually contains address of sender

Previous slide

Next slide

Back to first slide

View graphic version