PM4332 Datasheet, PDF (314/446 Pages) PMC-Sierra, Inc – HIGH DENSITY 32 CHANNEL T1/E1/J1 FRAMER

PRELIMINARY
DATA SHEET
PMC-2011402
ISSUE 1
PM4332 TE-32
HIGH DENSITY 32 CHANNEL T1/E1/J1 FRAMER
Register 0x01E4 System Side INSBI Tributary Register Indirect Access
Control
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R
R/W
R/W
Function
BUSY
Unused
Unused
Unused
Unused
Unused
RWB
PAGE
Default
X
X
X
X
X
X
0
0
PAGE:
The indirect page select bit (PAGE) selects between the two pages in the
tributary mapping RAMs.
RWB:
The indirect access control bit, RWB selects between a configure (write) or
interrogate (read) access to the tributary mapping or control configuration
RAM. Writing a logic 0 to RWB triggers an indirect write operation. Data to
be written is taken from the System Side INSBI Tributary Mapping Indirect
Access Data Register or System Side INSBI Tributary Control Indirect Access
Data Register. Writing a logic 1 to RWB triggers an indirect read operation.
The data read can be found in the System Side INSBI Tributary Mapping
Indirect Access Data Register or System Side INSBI Tributary Control Indirect
Access Data Register
BUSY:
The indirect access status bit (BUSY) reports the progress of an indirect
access. BUSY is set to logic 1 when a write to this register triggers an indirect
access and will stay high until the access is complete. This register should be
polled to determine when data from an indirect read operation is available in
the Indirect Tributary Data register or to determine when a new indirect write
operation may commence. The BUSY bit is asserted for up to 4.32us after a
page switch. If SREFCLK disappears during an access, the BUSY bit can
stay high.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR THE INTERNAL USE OF ITS CUSTOMERS
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