PM8610-BIAP PMC [PMC-Sierra, Inc], PM8610-BIAP Datasheet - Page 319

• Manufacturer Part Number: PM8610-BIAP
• Description: SBS Telecom Standard Product Data Sheet Preliminary
• Manufacturer: PMC [PMC-Sierra, Inc]

14.12 Outgoing 19.44 MHz TelecomBus Functional Timing
14.13 Outgoing SBI336 Functional Timing
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000168, Issue 3
Figure 45 shows the Outgoing TelecomBus interface configured for 19.44 MHz mode. The figure
is very similar to Figure 44 with one quarter the number of synchronous payload envelopes.
Timing is provided by a 19.44 MHz SREFCLK sourced from SREFCLK19 which is generated
by the SBS from the 77.76 MHz SYSCLK.
Figure 45 Outgoing 19.44 MHz TelecomBus Functional Timing
Figure 46 shows the functional timing for the outgoing 77.76 MHz SBI336 bus configured for
connection to a link layer device. When configured for the SBI336 bus, timing is provided by a
77.76 MHz SREFCLK which is also connected to SYSCLK. When connecting to a link layer
device the justification request signal, JUST_REQ[1], is output from the SBS and is used to
control the link timing. If the SBS is connected to a physical layer device the JUST_REQ[1]
signal is an input synchronized to IC1FP rather than OC1FP. With the exception of the
JUST_REQ[1] signal, the functional timing of the outgoing SBI336 bus is the same when
connecting to a physical layer device as connecting to a link layer device.
OC1FP[x] (OC1J1V1[x])
ODATA[x][7:0]
SREFCLK19
SREFCLK
OTAIS[x]
SYSCLK
OTPL[x]
ODP[x]
OPL[x]
OV5[x]
OCMP
A2
Vaild
J0
Z0
Z0
B522 - J1
OPTIONALLY SET FOR J1
X
BYTE POSITIONS
B522 - J1
SBS Telecom Standard Product Data Sheet
B522 - J1
OPTIONALLY SET FOR V1
B523 - V1
BYTE POSITIONS
S1,3
H3
Preliminary
X
S1,1
B0
319
X
S1,2
B0