DS21354LB Maxim Integrated Products, DS21354LB Datasheet - Page 77

• Manufacturer Part Number: DS21354LB
• Description: Network Controller & Processor ICs E1 Single-Chip Trans ceiver (SCT) E1 Fram
• Manufacturer: Maxim Integrated Products

THIR: TRANSMIT HDLC INFORMATION REGISTER (Address = B6 Hex)
Note: The TUDR bit is latched and is cleared when read.
THFR: TRANSMIT HDLC FIFO REGISTER (Address = B7 Hex)
SYMBOL
SYMBOL
TEMPTY
HDLC7
(MSB)
(MSB)
HDLC7
HDLC6
HDLC5
HDLC4
HDLC3
HDLC2
HDLC1
HDLC0
TFULL
TUDR
—
—
—
—
—
—
HDLC6
POSITION
POSITION
THFR.7
THFR.6
THFR.5
THFR.4
THFR.3
THFR.2
THFR.1
THFR.0
THIR.7
THIR.6
THIR.5
THIR.4
THIR.3
THIR.2
THIR.1
THIR.0
—
HDLC5
Not Assigned. Could be any value when read.
Not Assigned. Could be any value when read.
Not Assigned. Could be any value when read.
Not Assigned. Could be any value when read.
Not Assigned. Could be any value when read.
Transmit FIFO Empty. A real-time bit that is set high when the FIFO is
empty.
Transmit FIFO Full. A real-time bit that is set high when the FIFO is
full.
Transmit FIFO Underrun. Set when the transmit FIFO empties out
without the TEOM control bit being set. An abort is automatically sent.
HDLC Data Bit 7. MSB of a HDLC packet data byte.
HDLC Data Bit 6.
HDLC Data Bit 5.
HDLC Data Bit 4.
HDLC Data Bit 3.
HDLC Data Bit 2.
HDLC Data Bit 1.
HDLC Data Bit 0. LSB of a HDLC packet data byte.
—
HDLC4
—
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NAME AND DESCRIPTION
NAME AND DESCRIPTION
HDLC3
—
TEMPTY
HDLC2
HDLC1
TFULL
HDLC0
TUDR
(LSB)
(LSB)