Digi NS9750 - Manual (Page 580)

F l o w c h a r t s
5 5 6 N S 9 7 5 0 H a r d w a r e R e f e r e n c e
Flow charts
Master module (normal mode, 16-bit)
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