PM8611-BIAP PMC [PMC-Sierra, Inc], PM8611-BIAP Datasheet - Page 116

• 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
Register 042H: OSTT Tributary Translator Control RAM Indirect Access Data Register
JUST_REQ_EN
TVT
Bit
Bit 2-15
Bit 1
Bit 0
The JUST_REQ_EN bit is used to enable T1, E1, DS3, E3 and Fractional rate justification
request state machines to convert V5, V5+ and V5- characters to JUST_REQs. When this bit
is set to 1 the justification request state machines will convert V5 characters to the
JUST_REQ signal. When this bit is set to 0 the state machines will not generate JUST_REQ.
This bit should be set to 1 when this device is being used in SBI mode and is connected to
link layer device which is clock slave to the transmit tributary.
This bit should not be set if the TVT bit is set. This bit has no effect in TelecomBus mode.
The TVT bit configures a T1 or E1 tributary as a transparent virtual tributary. When TVT is
set to 1 the T1 or E1 tributary is configured as a TVT. Being a TVT, the ERDI and REI bits
are received from the serial link in one of the V5 characters and are output on ODATA during
the V5 byte. When TVT is set to 0 the T1 or E1 tributary is configured as a standard T1 or E1
link.
This bit should not be set if the JUST_REQ_EN bit is set. This bit has no effect in
TelecomBus mode or if the SPE is configured to something other that T1 or E1 data.
Type
R
R/W
R/W
TVT
JUST_REQ_EN
Function
Unused
SBSLITE™ Telecom Standard Product Data Sheet
Default
0
0
0
Preliminary
115