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ST75C540FP-A 데이터시트(PDF) 36 Page - STMicroelectronics

부품명 ST75C540FP-A
상세설명  SUPER INTEGRATED DEVICESWITH DSP, AFE & MEMORIES FORTELEPHONY,MODEM, FAXOVERINTERNET& POTSLINES
PDF  84 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST75C540FP-A 데이터시트(HTML) 36 Page - STMicroelectronics

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MR
Memory Read
MR
Opcode:
10
000
10000
Synopsis
MR allowsthe readingof a 16-bitparameter.The parameterspecifiesthe parameteraddress.
Parameters
Field
Byte
Pos.
Value
Definition
MR_ADDR_L
1
7..0
Low byte of the 16-bit address
MR_ADDR_H
2
7..0
High byte of the 16-bit address
MRI
Memory Read Indirect
MRI
Opcode:
28
001
01000
Synopsis
MRI allows the reading of a 16-bit parameter. The parameter specifies an indirect address.
Refer to the “RAM Mapping Application Note” (delivered on request according to revision
number). The advantage to use MRI instead of MR is that the Indirect Address is constant
over the different release of the product.
Parameters
Field
Byte
Pos.
Value
Definition
MRI_IADDR
1
7..0
Indirect Address
MRLO
Memory Read Low Word
MRLO
Opcode:
29
001
01001
Synopsis
MRLO allows the reading of the memory location which address coresponds to the previous
MR or MRI Absolute Adress minus 1. This command must be preceded by a MR or MRI
command. This command does not have any parameter. The double word reading is
executed by the MR or MRI previous command.
MW
Memory Write
MW
Opcode:
12
000
10010
Synopsis
MW allows the writing of a 16-bit parameter. The parameter specifies the address as well
as the value to be transferred.
Parameters
Field
Byte
Pos.
Value
Definition
MW_ADDR_L
1
7..0
Low byte of the 16-bit address
MW_ADDR_H
2
7..0
High byte of the 16-bit address
MW_VALUE_L
3
7..0
Low byte of the 16-bit value
MW_VALUE_H
4
7..0
High byte of the 16-bit value
VII - COMMAND SET DESCRIPTION (continued)
ST75C530 - ST75C540
36/84



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