PM8611-BIAP PMC [PMC-Sierra, Inc], PM8611-BIAP Datasheet - Page 76

• Manufacturer Part Number: PM8611-BIAP
• Manufacturer: PMC [PMC-Sierra, Inc]

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010883, Issue 2
COLUMN_MODE
PHY_SBI
MF_48
TELECOM_BUS
Reserved[0]
The COLUMN_MODE bit selects between column switching and DS0 switching. When
COLUMN_MODE is set to a logic one, column switching is enabled and the SBSLITE is
configured to switch columns within the SBI336 or TelecomBus. When COLUMN_MODE
is set to a logic zero, DS0 switching is enabled and the SBSLITE is configured to switch
DS0’s within the SBI336 bus. DS0 switching is not permitted in TelecomBus mode.
The PHY_SBI bit configures the direction of the JUST_REQ input/output signals on the
incoming and outgoing buses. When PHY_SBI is set to a logic one, the SBSLITE is
configured to be connected to a PHY device and the JUST_REQ signal is an input. When
PHY_SBI is set to a logic zero, the SBSLITE is configured to be connected to a Link layer
device and the JUST_REQ signal is an output.
The MF_48 bit selects between 4 frame multiframe mode or 48 frame multiframe mode on
the SBI336 bus. When MF_48 is a logic one, 48 frame mode is selected. IC1FP is expected
once every 48 frames and OC1FP is output every 48 frames, indicating CAS signaling
multiframe alignment. When MF_48 is a logic zero, 4 frame mode is selected. IC1FP is
expected once every 4 frames and OC1FP is output every 4 frames. This bit has no effect
when in TelecomBus mode (TELECOM_BUS = ‘b1).
The TELECOM_BUS bit selects between TelecomBus and SBI bus modes on the incoming
and outgoing buses. When TELECOM_BUS is set to a logic one, TelecomBus mode is
selected and all frame pulses must mark C1J1V1 positions. When TELECOM_BUS is set to
a logic zero, SBI bus mode is selected and the all frame pulses only mark the C1 position.
This bit must be set to a logic one for proper operation of the SBSLITE.
SBSLITE™ Telecom Standard Product Data Sheet
Preliminary
75