Maxim DS33R11 specifications TR.INFO5, TR.INFO6, PS2 PS1 PS0, TR.INFO4

	DS33R11 Ethernet Mapper with Integrated T1/E1/J1 Transceiver
Register Name:	TR.INFO5, TR.INFO6
Register Description:	HDLC #1 Information Register
Register Address:	HDLC #2 Information Register
	2Eh, 2Fh

Bit #

Name

Default

7	6	5	4	3	2	1	0
—	—	TEMPTY	TFULL	REMPTY	PS2	PS1	PS0
0	0	0	0	0	0	0	0

Bit 5: Transmit FIFO Empty (TEMPTY). A real-time bit that is set high when the FIFO is empty.

Bit 4: Transmit FIFO Full (TFULL). A real-time bit that is set high when the FIFO is full.

Bit 3: Receive FIFO Empty (REMPTY). A real-time bit that is set high when the receive FIFO is empty.

Bits 0 – 2: Receive Packet Status (PS0 to PS2). These are real-time bits indicating the status as of the last read of the receive FIFO.

PS2	PS1	PS0		Packet Status
0	0	0		In Progress
0	0	1		Packet OK: Packet ended with correct CRC codeword
0	1	0		CRC Error: A closing flag was detected, preceded by a corrupt CRC
				codeword
0	1	1		Abort: Packet ended because an abort signal was detected (seven
				or more 1s in a row).
1	0	0		Overrun: HDLC controller terminated reception of packet because
				receive FIFO is full.
Register Name:			TR.INFO4
Register Description:			HDLC Event Information Register #4
Register Address:			2Dh

Bit #

Name

Default

7	6	5	4	3	2	1	0
—	—	—	—	H2UDR	H2OBT	H1UDR	H1OBT
0	0	0	0	0	0	0	0

Bit 3: HDLC #2 Transmit FIFO Underrun Event (H2UDR). Set when the transmit FIFO empties out without having seen the TMEND bit set. An abort is automatically sent. This bit is latched and is cleared when read.

Bit 2: HDLC #2 Opening Byte Event (H2OBT). Set when the next byte available in the receive FIFO is the first byte of a message.

Bit 1: HDLC #1 Transmit FIFO Underrun Event (H1UDR). Set when the transmit FIFO empties out without having seen the TMEND bit set. An abort is automatically sent. This bit is latched and is cleared when read.

Bit 0: HDLC #1 Opening Byte Event (H1OBT). Set when the next byte available in the receive FIFO is the first byte of a message.

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