DS21FF42 Maxim Integrated Products, DS21FF42 Datasheet - Page 51

• Manufacturer Part Number: DS21FF42
• Description: IC FRAMER T1 4X4 16CH 300-BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21FF42

• Controller Type: T1 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

MOSCR1: MULTIFRAMES OUT OF SYNC COUNT REGISTER 1(Address = 25 Hex)
MOSCR2: MULTIFRAMES OUT OF SYNC COUNT REGISTER 2(Address = 27 Hex)
NOTES:
1. The lower nibble of the counter at address 25 is used by the Path Code Violation Count Register
2. MOSCR counts either errors in framing bit position (RCR2.0=0) or the number of multiframes out of
MULTIFRAMES OUT OF SYNC COUNTING ARRANGEMENTS Table 11-3
12.
Each framer in the DS21Q42 has the ability to monitor one DS0 64 Kbps channel in the transmit
direction and one DS0 channel in the receive direction at the same time. In the transmit direction the user
will determine which channel is to be monitored by properly setting the TCM0 to TCM4 bits in the
CCR5 register. In the receive direction, the RCM0 to RCM4 bits in the CCR6 register need to be
properly set. The DS0 channel pointed to by the TCM0 to TCM4 bits will appear in the Transmit DS0
Monitor (TDS0M) register and the DS0 channel pointed to by the RCM0 to RCM4 bits will appear in the
Receive DS0 (RDS0M) register.
(MSB)
MOS/
MOS/
FB11
FB7
sync (RCR2.0=1)
MOS/FB11
SYMBOL
MOS/FB0
FRAMING MODE
DS0 MONITORING FUNCTION
(CCR2.3)
MOS/
MOS/
FB10
FB6
ESF
ESF
D4
D4
POSITION
MOSCR1.7
MOSCR2.0
MOS/
MOS/
FB9
FB5
MOS/
MOS/
FB8
FB4
COUNT MOS OR F–BIT
NAME AND DESCRIPTION
MSB of the 12–Bit Multiframes Out of Sync or F–Bit
Error Count (note #2)
LSB of the 12–Bit Multiframes Out of Sync or F–Bit
Error Count (note #2)
(note 1)
ERRORS
(RCR2.0)
MOS/
FB3
F–Bit
F–Bit
MOS
MOS
51 of 114
(note 1)
MOS/
FB2
(note 1)
MOS/
FB1
number of multiframes out of
sync
errors in the Ft pattern
number of multiframes out of
sync
errors in the FPS pattern
WHAT IS COUNTED
IN THE MOSCRs
(note 1)
(LSB)
MOS/
FB0
MOSCR1
MOSCR2