PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
Register 0x04E: SDRAM DIAG READ CMD 1
Bit
Type
Function
Default
15:0
R/W
RD_BUFFER ADDR[15:0]
0
RD_BUFFER_ADDR[15:0]
Indicates the lower 16 bits of the addresses of the cell buffer to read. SDRAM
DIAG Read CMD 2 provides the upper address bit and triggers the burst
access to happen.
Register 0x050: SDRAM DIAG READ CMD 2
Bit
Type
Function
Default
15
14:1
0
R
RDBUSY
Unused
RD_BUFFER ADDR[16]
0
R/W
A write to the SDRAM DIAG READ CMD 2 register will trigger a transfer of data
from the external SDRAM to the Read Burst Ram. The lower bits of the address
of the cell buffer in the external SDRAM are given in the SDRAM DIAG READ
CMD 1 register.
RD_BUFFER_ADDR[16]
Indicates the upper bit of the addresses of the cell buffer to read. SDRAM
DIAG READ CMD 1 provides the lower address bits.
RDBUSY
The Read Busy bit (RDBUSY) reports the progress of the read access to
SDRAM. RDBUSY is set high when this register is written; this triggers the
SDRAM access; it stays high until the access is complete. At which point,
RD_BUSY will be set low. This register should be polled to determine when
the data is available in the Burst Ram.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
124
PMC [ PMC-SIERRA, INC ]
