LAN9312 datasheet(395/458 Pages) SMSC

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High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

SMSC LAN9312

395

Revision 1.2 (04-08-08)

DATASHEET

14.5.3.26

Switch Engine Ingress Rate Command Register (SWE_INGRSS_RATE_CMD)

This register is used to indirectly read and write the ingress rate metering/color table registers. A write

to this address performs the specified access.

For a read access, the Operation Pending bit in the Switch Engine Ingress Rate Command Status

Engine Ingress Rate Read Data Register (SWE_INGRSS_RATE_RD_DATA) can then be read.

For

write

access,

the

Switch

Engine

Ingress

Rate

W r it e

Dat a

(SWE_INGRSS_RATE_WR_DATA) should be written first. The Operation Pending bit in the Switch

Engine Ingress Rate Command Status Register (SWE_INGRSS_RATE_CMD_STS) indicates when the

command is finished.

For details on 16-bit wide Ingress Rate Table registers indirectly accessible by this register, see

Section 14.5.3.26.1 below.

184Bh

Size:

32 bits

BITS

DESCRIPTION

TYPE

DEFAULT

31:8

RESERVED

Ingress Rate RnW

These bits specify a read(1) or write(0) command.

R/W

6:5

Type

These bits select between the ingress rate metering/color table registers as

follows:

00 = RESERVED

01 = Committed Information Rate Registers (uses CIS Address field)

10 = Committed Burst Register

11 = Excess Burst Register

R/W

00b

4:0

CIR Address

These bits select one of the 24 Committed Information Rate registers.

When Rate Mode is set to Source Port & Priority in the Switch Engine

Ingress Rate Configuration Register (SWE_INGRSS_RATE_CFG), the first

set of 8 registers (CIR addresses 0-7) are for to Port 0, the second set of 8

registers (CIR addresses 8-15) are for Port 1, and the third set of registers

(CIR addresses 16-23) are for Port 2. Priority 0 is the lower register of each

set (e.g. 0, 8, and 16).

When Rate Mode is set to Source Port Only, the first register (CIR address

0) is for Port 0, the second register (CIR address 1) is for Port 1, and the

third register (CIR address 2) is for Port 2.

When Rate Mode is set to Priority Only, the first register (CIR address 0) is

for priority 0, the second register (CIR address 1) is for priority 1, and so

forth up to priority 23.

Note:

Values outside of the valid range may cause unexpected results.

R/W

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