AR8327-AL1A-R datasheet(312/394 Pages) ETC2

312 / 394 page

312 • AR8327/AR8327N Seven-port Gigabit Ethernet Switch

Atheros Communications, Inc.

312 • June 2011

COMPANY CONFIDENTIAL

Table 3-311.

Port 4 Ingress Rate Limit Control Register 0

3.7.161 PORT4_ING_RATE_CTRL0

Address 0x0B44

SFT&HW RST

Table 3-312, “Port 4 Ingress Rate Limit Control Register 1,” on page 312 summerizes the

PORT4_ING_RATE_CTRL0 Register 1

Table 3-312.

Port 4 Ingress Rate Limit Control Register 1

Bit

R/W

Inital

Value

Mnemonic

Description

31:24

R/O

‘h18

ADD_RATE_BYTE_4

Byte number should be added to frame

when calculate rate limit.

Default is 24 bytes for IPG, preamble,

crc and SFD.

23:22

R/W

2’b01

ING_RATE_C_TIME_SLOT_4

Committed Ingress rate limit control

timer slot.

2'b00: 100us;

2'b01: 1ms

2'b10: 10ms

2'b11: 100ms

Notes: if port rate limit set to less than

96kbps, don't select 100us as time slot.

R/W

RESERVED

R/W

ING_RATE_MODE_4

1: one two-rate three-color

0: two single rate

19:18

R/W

RESERVED

17:15

R/W

ING_CBS_4

Committed burst size for ingress rate

limit

14:0

R/W

0x7FFF

ING_CIR_4

Committed Ingress Rate Limit for all

priority.

Rate is limited to times of 32kbps.

Default 15'h7FFF is for disable rate

limit for egress priority 2. if these bits

are set to 15'h0, no frame should be

received in from this port.

Bit

R/W

Inital

Value

Mnemonic

Description

31:24

R/O

RESERVED

R/W

ING_BORROW_EN_4

Borrow enable

R/W

ING_RATE_UNIT_4

1: Packets/ 0: bytes

R/W

ING_CF_4

Coupling flagfor ingress rate limit

R/W

ING_CM_4

Color mode for ingress rate limit

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