CX28394/28395/28398
2.0 Circuit Description
Quad/x16/Octal—T1/E1/J1 Framers
2.4 Transmitter
Figure 2-23. Interrupt-Driven Transmit Data Link Processing
Main Line Code
Message
Transmit Message
0x00
0x20
0x40
0x60
Block 1
Block 2
Block 3
Block 4
Write Block/Byte to FIFO
Return
Interrupt Service Routine
Interrupt Occurred
Read Interrupt Status
If
Transmit Data
Link Near Empty
Interrupt
No
Yes
Write Block/Byte to FIFO
Process Other Interrupt
Return
If
No
End of
Message
Yes
Write End of Message Register
Return
Return
100054E
Conexant
2-45