DS21FT42 Maxim Integrated Products, DS21FT42 Datasheet - Page 43

• Manufacturer Part Number: DS21FT42
• Description: IC FRAMER T1 4X3 12CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FT42

• Controller Type: T1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 225mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

RIR1: RECEIVE INFORMATION REGISTER 1 (Address=22 Hex)
(MSB)
COFA
SYMBOL
SYMBOL
F2HDLC
F1HDLC
F0HDLC
COFA
RESE
RESF
SEFE
F2SR
F1SR
F0SR
16ZD
B8ZS
8ZD
8ZD
POSITION
POSITION
RIR1.7
RIR1.6
RIR1.5
RIR1.4
RIR1.3
RIR1.2
RIR1.1
ISR.5
ISR.4
ISR.3
ISR.2
ISR.1
ISR.0
16ZD
NAME AND DESCRIPTION
NAME AND DESCRIPTION
FRAMER 2 HDLC CONTROLLER INTERRUPT
REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
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.
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.
RESF
43 of 114
RESE
SEFE
B8ZS
(LSB)
FBE