DS21Q42T+ Maxim Integrated Products, DS21Q42T+ Datasheet - Page 65
![IC FRAMER ENHANCED T1 4X 128TQFP](/photos/6/82/68247/128-lqfp_21-0086d_sml.jpg)
DS21Q42T+
Manufacturer Part Number
DS21Q42T+
Description
IC FRAMER ENHANCED T1 4X 128TQFP
Manufacturer
Maxim Integrated Products
Datasheet
1.DS21Q42T.pdf
(116 pages)
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
- Current page: 65 of 116
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HIMR: HDLC INTERRUPT MASK REGISTER (Address = 02 Hex)
RHIR: RECEIVE HDLC INFORMATION REGISTER (Address = 03 Hex)
(MSB)
RABT
(MSB)
RBOC
SYMBOL
SYMBOL
REMPTY
TMEND
RHALF
THALF
RCRCE
ROVR
RBOC
RABT
RVM
RNE
RPE
RPS
TNF
RCRCE
RPE
POSITION
POSITION
HIMR.7
HIMR.6
HIMR.5
HIMR.4
HIMR.3
HIMR.2
HIMR.1
HIMR.0
RHIR.7
RHIR.6
RHIR.5
RHIR.4
RHIR.3
ROVR
RPS
RVM
NAME AND DESCRIPTION
Receive BOC Detector Change of State.
0 = interrupt masked
1 = interrupt enabled
Receive Packet End.
0 = interrupt masked
1 = interrupt enabled
Receive Packet Start.
0 = interrupt masked
1 = interrupt enabled
Receive FIFO Half Full.
0 = interrupt masked
1 = interrupt enabled
Receive FIFO Not Empty.
0 = interrupt masked
1 = interrupt enabled
Transmit FIFO Half Empty.
0 = interrupt masked
1 = interrupt enabled
Transmit FIFO Not Full.
0 = interrupt masked
1 = interrupt enabled
Transmit Message End.
0 = interrupt masked
1 = interrupt enabled
NAME AND DESCRIPTION
Abort Sequence Detected. Set whenever the HDLC controller
sees 7 or more ones in a row.
CRC Error. Set when the CRC checksum is in error.
Overrun. Set when the HDLC controller has attempted to write
a byte into an already full receive FIFO.
Valid Message. Set when the HDLC controller has detected and
checked a complete HDLC packet.
Empty. A real–time bit that is set high when the receive FIFO is
empty.
RHALF
65 of 116
REMPTY
RNE
POK
THALF
CBYTE
TNF
(LSB)
OBYTE
TMEND
(LSB)
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