DS21Q42T+ Maxim Integrated Products, DS21Q42T+ Datasheet - Page 39

• Manufacturer Part Number: DS21Q42T+
• Description: IC FRAMER ENHANCED T1 4X 128TQFP
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q42T+

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 128-TQFP, 128-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

RIR1: RECEIVE INFORMATION REGISTER 1 (Address=22 Hex)
(MSB)
COFA
SYMBOL
SYMBOL
F0SR ISR
F1HDLC
F0HDLC
COFA
RESE
16ZD
RESF
SEFE
B8ZS
F2SR
F1SR
8ZD
FBE
8ZD
POSITION
POSITION
RIR1.7
RIR1.6
RIR1.5
RIR1.4
RIR1.3
RIR1.2
RIR1.1
RIR1.0
ISR.4
ISR.3
ISR.2
ISR.1
16ZD
0
NAME AND DESCRIPTION
FRAMER 2 SR1 or SR2 INTERRUPT REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
FRAMER 1 HDLC CONTROLLER INTERRUPT
REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
FRAMER 1 SR1 or SR2 INTERRUPT REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
FRAMER 0 HDLC CONTROLLER INTERRUPT
REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
FRAMER 0 SR1 or SR2 INTERRUPT REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
RESF
NAME AND DESCRIPTION
Change of Frame Alignment. Set when the last resync
resulted in a change of frame or multiframe alignment.
Eight Zero Detect. Set when a string of at least eight
consecutive zeros (regardless of the length of the string) have
been received at RPOS and RNEG.
Sixteen Zero Detect. Set when a string of at least sixteen
consecutive zeros (regardless of the length of the string) 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. Set when 2 out of 6
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. Useful for
automatically setting the line coding.
Frame Bit Error. Set when a Ft (D4) or FPS (ESF) framing
bit is received in error.
39 of 116
RESE
SEFE
B8ZS
(LSB)
FBE