ds265188-port-t1-e1-j1-transc Maxim Integrated Products, Inc., ds265188-port-t1-e1-j1-transc Datasheet - Page 266

• Manufacturer Part Number: ds265188-port-t1-e1-j1-transc
• Description: Ds26518 8-port T1/e1/j1 Transceiver
• Manufacturer: Maxim Integrated Products, Inc.

Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bit 2: Transmit FIFO Full (TFF). When 0, the transmit FIFO contains 255 or less bytes of data. When 1, the
transmit FIFO is full.
Bit 1: Transmit FIFO Empty (TFE). When 0, the transmit FIFO contains at least one byte of data. When 1, the
transmit FIFO is empty.
Bit 0: Transmit HDLC-256 Data Storage Available (THDA). When 0, the transmit FIFO has less storage space
available in the transmit FIFO than the transmit HDLC-256 data storage available level (TDAL[4:0]). When 1, the
transmit FIFO has the same or more storage space available than the transmit FIFO HDLC-256 data storage
available level.
Register Name:
Register Description:
Register Address:
Bit #
Name
Default
Bits 5 to 0: Transmit FIFO Fill Level (TFFL[5:0]). These six bits indicate the number of eight byte groups
available for storage (do not contain data) in the transmit FIFO, e.g., a value of 21 (15h) indicates the FIFO has 168
(A8h) to 175 (AFh) bytes are available for storage.
—
—
7
0
7
0
—
—
6
0
6
0
TH256SR1
Transmit HDLC-256 Status Register 1
1504h + (20h x (n - 1)) : where n = 1 to 8
TH256SR2
Transmit HDLC-256 Status Register 2
1505h + (20h x (n - 1)) : where n = 1 to 8
TFFL5
—
5
0
5
0
266 of 313
TFFL4
—
4
0
4
0
TFFL3
—
3
0
3
0
DS26518 8-Port T1/E1/J1 Transceiver
TFFL2
TFF
2
0
2
0
TFFL1
TFE
1
0
1
0
TFFL0
THDA
0
0
0
0