BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 85

• Manufacturer Part Number: BT8375
• Description: single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8370/8375/8376
Fully Integrated T1/E1 Framer and Line Interface
Figure 2-30. Polled Transmit Data Link Processing
N8370DSE
NOTE(S):
Selected N based on the data rate of link.
bandwidth of your system. For systems with 1 CPU dedicated to 1 Bt8370, the
data link status can be polled, and the 64-byte transmit FIFO can be used like a
single byte transmit buffer. For systems where a single CPU controls multiple
Bt8370s, the data link can be interrupt-driven and the entire 64-byte transmit
FIFO can be used to store entire messages. See
high-level description of polling and interrupt-driven Transmit Data Link
Controller software.
No
The Transmit Data Link Controller can be programmed according to the CPU
Write Block/Byte to FIFO
Wait N Milliseconds
Transmit Message
Read FIFO Status
Yes
FIFO Empty
Message
or Near
End of
Empty
If
If
No
Conexant
Yes
Write End of Message Register
Figures 2-30
Return
0x00
0x20
0x40
Message
Block 1
Block 2
Block 3
2.0 Circuit Description
and
2-31
2.8 Transmitter
for a
2-57