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DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
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Table 10-12. HDLC Controller Registers
REGISTER FUNCTION
CONTROL AND CONFIGURATION
TR.H1TC, HDLC #1 Transmit Control Register
TR.H2TC, HDLC #2 Transmit Control Register
General control over the transmit HDLC controllers
TR.H1RC, HDLC #1 Receive Control Register
TR.H2RC, HDLC #2 Receive Control Register
General control over the receive HDLC controllers
TR.H1FC, HDLC #1 FIFO Control Register
TR.H2FC, HDLC #2 FIFO Control Register
Sets high watermark for receiver and low
watermark for transmitter
STATUS AND INFORMATION
TR.SR6, HDLC #1 Status Register
TR.SR7, HDLC #2 Status Register
Key status information for both transmit and
receive directions
TR.IMR6, HDLC #1 Interrupt Mask Register
TR.IMR7, HDLC #2 Interrupt Mask Register
Selects which bits in the status registers (SR7 and
SR8) cause interrupts
TR.INFO4, HDLC #1 and #2 Information Register
TR.INFO5, HDLC #1 Information Register
TR.INFO6, HDLC #2 Information Register
Information about HDLC controller
TR.H1RPBA, HDLC #1 Receive Packet Bytes Available
TR.H2RPBA, HDLC #2 Receive Packet Bytes Available
Indicates the number of bytes that can be read
from the receive FIFO
TR.H1TFBA, HDLC #1 Transmit FIFO Buffer Available
TR.H2TFBA, HDLC #2 Transmit FIFO Buffer Available
Indicates the number of bytes that can be written to
the transmit FIFO
MAPPING
TR.H1RCS1, TR.H1RCS2, TR.H1RCS3, TR.H1RCS4,
HDLC #1 Receive Channel Select Registers
TR.H2RCS1, TR.H2RCS2, TR.H2RCS3, TR.H2RCS4,
HDLC #2 Receive Channel Select Registers
Selects which channels are mapped to the receive
HDLC controller
TR.H1RTSBS, HDLC #1 Receive TS/Sa Bit Select
TR.H2RTSBS, HDLC #2 Receive TS/Sa Bit Select
Selects which bits in a channel are used or which
Sa bits are used by the receive HDLC controller
TR.H1TCS1, TR.H1TCS2, TR.H1TCS3, TR.H1TCS4,
HDLC #1 Transmit Channel Select Registers
TR.H2TCS1, TR.H2TCS2, TR.H2TCS3, TR.H2TCS4,
HDLC #2 Transmit Channel Select Registers
Selects which channels are mapped to the transmit
HDLC controller
TR.H1TTSBS, HDLC # 1 Transmit TS/Sa Bit Select
TR.H2TTSBS, HDLC # 2 Transmit TS/Sa Bit Select
Selects which bits in a channel are used or which
Sa bits are used by the transmit HDLC controller
FIFOs
TR.H1RF, HDLC #1 Receive FIFO Register
TR.H2RF, HDLC #1 Receive FIFO Register
Access to 128-byte receive FIFO
TR.H1TF, HDLC #1 Transmit FIFO Register
TR.H2TF, HDLC #2 Transmit FIFO Register
Access to 128-byte transmit FIFO