PM5364 pmc-sierra, PM5364 Datasheet - Page 172

• Manufacturer Part Number: PM5364
• Description: Tupp 2488 Assp Telecom Standard
• Manufacturer: pmc-sierra

13.5.5
13.5.6
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2011334, Issue 7
Page Change Interrupt
The STSI functional block indicates that the current active page has changed by setting bit 0,
register offset 03H (STSI Interrupt Status, COAPI bit). Optionally the value of this bit can also
be used to create a hardware interrupt via the top level STSI interrupts. This behavior is
controlled by bit 0, register 02H (STSI Configuration register, COAPE bit). When this bit is set
to logic zero (the default hardware reset value) the value of the COAPI bit is suppressed and no
hardware interrupt can occur. When this bit is set to logic one, the value of the COAPI bit is
propagated to the external hardware interrupt logic.
STSI CMP Timing
In serial mode, LICMP is sampled for ingress STSI at IJ0, and delays for the
LINE_INGRESS_REF_DLY to allow J0s to align at the input to the STSIs. The sampled CMP
takes effect on the second next frame boundary. In the egress path, CMP is sampled on IJ0,
delayed for the egress SVCA delay and takes effect on the second next frame boundary. STS-1
switching will occur according to Figure 33. When in parallel mode, LICMP is sampled when
the J0 byte location is present at the input of the working ingress STSI and the active page
changes on the second next frame boundary. On the egress path in parallel mode, LECMP is
sampled on EJ0J1[1] (with EPL[1] = ‘0’) and takes effect on the second next frame boundary.
CMP can also be configured with the top level PSEL registers. This value is XORed with the
external CMPs. PSEL changes are sampled on the STSIs J0 and the page change takes effect on
the next frame boundary.
Figure 33 STSI Page Change Timing (LINE_PARALLEL = ‘0’)
Frame boundary in STSI
IJ0
CMP into STSI
IJ0 to STSI
STSI Page
PSEL = '0'
LICMP
0us
TUPP™ 2488 ASSP Telecom Standard Product Data Sheet
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