DS2151 Dallas Semiconducotr, DS2151 Datasheet - Page 17

• Manufacturer Part Number: DS2151
• Description: T1 Single-Chip Transceiver
• Manufacturer: Dallas Semiconducotr

from the interrupt pins via the Interrupt Mask Register 1 (IMR1) and Interrupt Mask Register 2 (IMR2)
respectively.
RIR1: RECEIVE INFORMATION REGISTER 1 (Address=22 Hex)
(MSB)
COFA
SYMBOL POSITION NAME AND DESCRIPTION
COFA
RESE
RESF
16ZD
SEFE
B8ZS
8ZD
8ZD
FBE
RIR1.7
RIR1.6
RIR1.5
RIR1.4
RIR1.3
RIR1.2
RIR1.1
RIR1.0
16ZD
Change of Frame Alignment.
resulted in a change of frame or multiframe alignment.
Eight 0 Detect. Set when a string of eight consecutive 0s have
been received at RPOS and RNEG.
Sixteen 0 Detect. Set when a string of 16 consecutive 0s have
been received at RPOS and RNEG.
Receive Elastic Store Full. Set when the receive elastic store
buffer fills and a frame is deleted.
Receive Elastic Store Empty. Set when the receive elastic
store buffer empties and a frame is repeated.
Severely Errored Framing Event.
framing bits (Ft or FPS) are received in error.
B8ZS Code Word Detect. Set when a B8ZS code word is
detected at RPOS and RNEG independent of whether the B8ZS
mode is selected or not via CCR2.6.
Frame Bit Error. Set when a Ft (D4) or FPS (ESF) framing
bit is received in error.
RESF
17 of 51
RESE
SEFE
Set when the last resync
Set when 2 out of 6
B8ZS
(LSB)
DS2151Q
FBE