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I2C MASTER/SLAVE INTERFACE
Flow charts
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Flow charts
Master module
(normal mode, 16-
bit)
Notes:
1 Writing M_ADDR_REQ is not required if the device address is not changed.
2 Read on a non-existing slave.
3 Do not wait for the slave to perform a
NO_ACK.
4
STATUS_REG and RX_DATA_REG are read simultaneously.
host idle
write (optional)
M_ADDR_REG
write cmd
M_READ
wait irq
read
rx/status
wait irq
read
rx/status
M_RX_DATA
irq
M_ARBIT_LOST
irq
M_NO_ACK
irq
write cmd
M_STOP
wait irq
read status
M_CMD_ACK
irq
write cmd
M_WRITE
write
TX_DATA_REG
write cmd
M_NOP
write
TX_DATA_REG
wait irq
read status
M_TX_DATA
irq
write cmd
M_NOP
write cmd
M_STOP
4
4
2
3
1
write cmd
M_WRITE
write (optional)
M_ADDR_REG
write cmd
M_READ
1