Released
Datasheet
PM73487 QRT
PMC-Sierra, Inc.
PMC-980618
Issue 3
622 Mbps ATM Traffic Management Device
Table 37. VI_VPI_TABLE Entry if VPC_ENTRY = 0 (Continued)
Description
Field (Bits)
VCC_ENTRY
(14)
Indicates that at least one valid VCC is referenced in the table pointed to by this entry. Initial-
ize to the proper setting.
VCI_BITS
(13:10)
The number of VCI bits to use minus 1. The valid entries are 15 down to 4.
BLOCK_OFFSET
(9:0)
The offset ÷ 32 within the channel number block for this VI/VP within the channel number
table. For AL_RAM_CONFIG = 3 (refer to “AL_RAM_CONFIG” on page 105), a
BLOCK_OFFSET(10) bit is needed. If VCI_BITS = Fh, then BLOCK_OFFSET(10) = 0. Oth-
erwise, BLOCK_OFFSET(10) = incoming cell VPI (0).
9.2.2 VCI_TABLE
The VCI_TABLE determines the channel number for VCCs.
Base address (refer to “AL_RAM_CONFIG” on page 105):
If AL_RAM_CONFIG = 0, then the base address is 202000h (808000h byte).
If AL_RAM_CONFIG = 1, then the base address is 204000h (810000h byte).
If AL_RAM_CONFIG = 2, then the base address is 208000h (820000h byte).
If AL_RAM_CONFIG = 3, then the base address is 220000h (880000h byte).
Index: 1h
Number of entries:
If AL_RAM_CONFIG = 0, then the entry number is 4K.
If AL_RAM_CONFIG = 1, then the entry number is 16K.
If AL_RAM_CONFIG = 2, then the entry number is 32K.
If AL_RAM_CONFIG = 3, then the entry number is 64K.
Type: Read/Write
Address = base_address + entry_number
Format: Refer to the following table.
Field (Bits)
Description
RAM is not present in these bit locations.
Not present
(31:16)
Not used
(15:14)
Write with a 0 to maintain software compatibility with future versions.
The receive channel number.
RX_CHAN_NUM
(13:0)
176
PMC [ PMC-SIERRA, INC ]
