PEF2054 SIEMENS [Siemens Semiconductor Group], PEF2054 Datasheet - Page 210

• Manufacturer Part Number: PEF2054
• Description: ICs for Communications
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

– in case the CM code field has already been initialized with the ‘ P channel’ code:
Reading an Upstream CFI idle Value
– Initializing an upstream CFI time slot as a P channel:
– Reading the upstream CFI idle value:
Reading Back the Idle Value Transmitted at a Downstream CFI P Channel:
Reading Back the CFI Functionality of a given CFI Time Slot:
Cancelling of a Programmed CFI P Channel:
Writing a Downstream CFI Idle Value
– in case the CM code field has not yet been initialized with the ‘ P channel’ code:
Semiconductor Group
W:MADR
W:MAAR
W:MACR
W:MADR
W:MAAR
W:MACR
W:MADR
W:MAAR
W:MACR
W:MAAR
W:MACR
wait for STAR:MAC = 0
R:MADR
W:MAAR
W:MACR
wait for STAR:MAC = 0
R:MADR
W:MAAR
W:MACR
wait for STAR:MAC = 0
R:MADR
W:MADR
W:MAAR
W:MACR
= downstream CFI port and time slot encoded according to figure 48
= downstream CFI port and time slot encoded according to figure 48
= upstream CFI port and time slot encoded according to figure 48
= upstream CFI port and time slot encoded according to figure 48
= downstream CFI port and time slot encoded according to figure 48
= CFI port and time slot encoded according to figure 48
= CFI idle value to be transmitted
= 0111 1001
= CFI idle value to be transmitted
= 0100 1000
= don’t care
= 0111 1001
= 1100 1000
= received CFI idle value
= 1100 1000
= transmitted CFI idle value
= CFI port and time slot encoded according to figure 48
= 1111 0000
= XXXX code
= don’t care
= 0111 0000
B
B
B
B
B
B
B
B
= 79
= 48
= 79
= C8
= C8
= F0
= 70
; if code = 1001, the CFI time slot is a ‘ P channel’
H
H
H
H
H
H
H
; MOC code ‘1001’ (CM data field access)
; CM code ‘1001’ ( P transfer)
; code ‘0000’ (unassigned channel)
; MOC code ‘111X’ (CM code field access)
; MOC code ‘1001’ (CM data field access)
; MOC code ‘1001’ (CM data field access)
; CM code ‘1001’ ( P transfer)
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Application Hints
PEB 2055
PEF 2055