
RELEASED
DATA SHEET
PM7366 FREEDM-8
ISSUE 4
PMC-1970930
FRAME ENGINE AND DATA LINK MANAGER
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA,INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
148
Register 0x2B0 : RMAC Packet Descriptor Reference Small Buffer Free Queue Read
Bit
Type
Function
Default
Bit 31 to
Bit 16
Unused
XXXXH
Bit 15
R/W
RPDRSFQR[15]
0
Bit 14
R/W
RPDRSFQR[14]
0
Bit 13
R/W
RPDRSFQR[13]
0
Bit 12
R/W
RPDRSFQR[12]
0
Bit 11
R/W
RPDRSFQR[11]
0
Bit 10
R/W
RPDRSFQR[10]
0
Bit 9
R/W
RPDRSFQR[9]
0
Bit 8
R/W
RPDRSFQR[8]
0
Bit 7
R/W
RPDRSFQR[7]
0
Bit 6
R/W
RPDRSFQR[6]
0
Bit 5
R/W
RPDRSFQR[5]
0
Bit 4
R/W
RPDRSFQR[4]
0
Bit 3
R/W
RPDRSFQR[3]
0
Bit 2
R/W
RPDRSFQR[2]
0
Bit 1
R/W
RPDRSFQR[1]
0
Bit 0
R/W
RPDRSFQR[0]
0
This register provides the Packet Descriptor Reference Small Buffer Free Queue read address.
Note
This register is not byte addressable. Writing to this register modifies all the bits in the register.
Byte selection using byte enable signals (CBEB[3:0]) are not implemented. However, when all
four byte enables are negated, no access is made to this register.
RPDRSFQR[15:0]:
The receive packet descriptor reference (RPDR) small buffer free queue read bits
(RPDRSFQR[15:0]) define bits 17 to 2 of the Receive Packet Descriptor Reference Small
Buffer Free Queue read pointer. This register is initialised by the host. The physical read
address in the RPDRSF queue is the sum of RPDRSFQR[15:0] left shifted by 2 bits with the
RQB[31:0] bits in the RMAC Receive Queue Base register.