Datasheet

DS26514 4-Port T1/E1/J1 Transceiver
19-5856; Rev 4; 5/11 83 of 305
Figure 9-20. HDLC Message Transmit Example
Configure Transmit
HDLC-256 Controller
(TH256CR1,2)
Write TH256FDR1, 2;
N = 8xTDAL -1
Read TH256SRL
exit
Enable Interrupt
(THDA)
Reset FIFO
(TH256CR1.TFRST)
INTB Active?
THDAL Set?
exit
N = 0 ?
Write TH256FDR1, 2;
N = N -1
YES
NO
NO
NO
YES
YES
exit
Packet End?
YES
exit
NO