MU9C8338A データシートの表示（PDF） - Music Semiconductors

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MU9C8338A

10/100Mb Ethernet Filter Interface

Music Semiconductors 

Software Model

MU9C8338A 10/100Mb Ethernet Filter Interface

Chip Registers

The system should decode one unique range of addresses

to produce an individual chip select (/PCS) signal for the

MU9C8338A component. The lowest address in this

Table 16: Chip Registers

Name

CHIPROL

CHIPVER

RSTAT

RDAT

R/W

Description

R/W

Chip Role

R

Chip Version

R

Result Status

R

Result Data

application-defined address range is referred to as

CHIP_BASE. Table 16 shows the Chip registers and their

address values.

Address

CHIP_BASE + 1H

CHIP_BASE + 2H

CHIP_BASE + 3H

CHIP_BASE + 4H

Default

0H

03H

N/A

N/A

Chip Role Register

The Chip Role register stores the designation of the

MU9C8338A. This register defaults to 0H. The register

must always contain 0H. All other values are reserved.

Table 17: CHIPROL: Chip Role Register Mapping

Name

CHIPROL

Bits

Function

2:0

Chip

Description

0: Default

All other values

are Reserved

Chip Version Register

The Chip Version register stores the version of the chip.

The value of this read-only register will be incremented

for each subsequent release.

Table 18: CHIPVER: Chip Version Register

Mapping

Name

CHIPVER

Bits

Description

4:0

Chip Version

Result Status Register

The Result Status register is used to convey whether the

Result Data register stores any valid result data. Reading

this register resets the /INTR pin if it was asserted because

of result data being processed (after all valid result data is

read).

Table 19: RSTAT: Result Status Register Mapping

Name

RDATA

Bits

Description

0

1: Result Data available

0: No Result Data

Result Data Register

The Result Data register stores the result of the automatic

SA and DA processing.

Table 20: RDAT: Result Data Register Mapping

Name

Bits Description

Source Port ID

15:10 6-bit Port ID

Packet Type

9:8 00: Broadcast

01: Multicast

10: Unicast

11: RESERVED

Match Found

7 0: Match Not Found

1: Match Found

Destination Port ID

6:1 6-bit Port ID

Destination Port = Source Port

0 1: Ports are the same

0: Ports are different

Rev. 0a

15

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