DS21FF44 Maxim Integrated Products, DS21FF44 Datasheet - Page 33

• Manufacturer Part Number: DS21FF44
• Description: IC FRAMER E1 4X4 16CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FF44

• Controller Type: E1 Framer
• Interface: Parallel/Serial
• Voltage - Supply: 2.97 V ~ 3.63 V
• Current - Supply: 300mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 300-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

IDR: DEVICE IDENTIFICATION REGISTER (Address = 0F Hex)
RCR1: RECEIVE CONTROL REGISTER 1 (Address = 10 Hex)
(MSB)
RSMF
(MSB)
T1E1
SYMBOL
SYMBOL
RESYNC
SYNCE
RSMF
RSIO
T1E1
RSM
FRC
ID3
ID2
ID1
ID0
—
—
RSM
0
POSITION
POSITION
RCR1.7
RCR1.6
RCR1.5
RCR1.4
RCR1.3
RCR1.2
RCR1.1
RCR1.0
IDR.7
IDR.3
IDR.1
IDR.2
IDR.0
RSIO
0
T1 or E1 Chip Determination Bit
0 = T1 chip
1 = E1 chip
Chip Revision Bit 3. MSB of a decimal code that represents
the chip revision.
Chip Revision Bit 2
Chip Revision Bit 1
Chip Revision Bit 0. LSB of a decimal code that represents
the chip revision.
RSYNC Multiframe Function. Only used if the RSYNC pin
is programmed in the multiframe mode (RCR1.6 = 1).
0 = RSYNC outputs CAS multiframe boundaries
1 = RSYNC outputs CRC4 multiframe boundaries
RSYNC Mode Select
0 = frame mode (See timing diagrams in Section 22.)
1 = multiframe mode (See timing diagrams in Section 22.)
RSYNC I/O Select. (Note: this bit must be set to zero when
RCR2.1 = 0).
0 = RSYNC is an output (depends on RCR1.6)
1 = RSYNC is an input (only valid if elastic store enabled)
Not Assigned. Should be set to zero when written.
Not Assigned. Should be set to zero when written.
Frame Resync Criteria
0 = resync if FAS received in error three consecutive times
1 = resync if FAS or bit 2 of non-FAS is received in error
three consecutive times
Sync Enable
0 = auto resync enabled
1 = auto resync disabled
Resync. When toggled from low to high, a resync is initiated.
Must be cleared and set again for a subsequent resync.
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0
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ID3
NAME AND DESCRIPTION
NAME AND DESCRIPTION
—
FRC
ID2
SYNCE
ID1
RESYNC
(LSB)
(LSB)
ID0