M7020 データシートの表示（PDF） - STMicroelectronics

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M7020

32K x 68-bit Entry NETWORK SEARCH ENGINE

STMicroelectronics 

M7020R

REGISTERS

All registers in the M7020R are 68 bits wide. The

M7020R contains 8 pairs of comparand storage

registers, 16 pairs of global mask registers

(GMRs), eight search successful index registers

and one each of CMD, information, burst READ,

burst WRITE, and next-free address registers. Ta-

ble 8 provides an overview of all the M7020R reg-

isters. The registers are ordered in ascending

address order. Each register group is then de-

scribed in the following subsections.

Table 8. Register Overview

Address Abbreviation

Type

0–31

COMP0–31

R

32–47

MASKS

RW

48–55

SSR0–7

R

56

COMMAND

RW

57

INFO

R

58

RBURREG

RW

59

WBURREG

RW

60

NFA

R

61–63

–

–

Name

16 Comparand Registers. Stores comparands from the DQ Bus for

learning later.

8 Global Mask Registers Array.

8 SEARCH Successful Index Registers.

Command Register.

Information Register.

Burst Read Register.

Burst Write Register.

Next Free Address Register.

Reserved

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