PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
Register 42AH, 46AH, 4AAH: RTTB, Indirect Address Select
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R
BUSY
RWB
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
This register provides the byte address within the tributary buffer addressed by
the Indirect Tributary Select register. Writing to this register triggers an indirect
register access..
A[5:0]:
The indirect address bits (A[5:0]) index into the receive and expected pages
of the tributary buffers.
RWB:
The indirect access control bit (RWB) selects between a read and write
operation into the tributary buffers. Writing a logic zero to RWB triggers an
indirect write operation. The tributary buffer is selected by the TUG2[2:0] and
TU[1:0] bits in the Indirect Tributary register. Selection between the capture
page and the expected page is controlled by the CPAGE bit also in the
Indirect Tributary register. Bytes within the tributary buffer are indexed by
A[5:0]. Data to be written is taken from D[7:0] of the Indirect Data register.
Writing a logic one to RWB triggers an indirect read operation. Tributary
buffer, page, and byte addressing is the same as in an indirect write
operation. The data read can be found in D[7:0] of the Indirect Data register.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
322
PMC [ PMC-SIERRA, INC ]
