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ST75C520 数据表(PDF) 18 Page - STMicroelectronics

部件名 ST75C520
功能描述  HIGH SPEED FAX MODEM DATA PUMP
PDF  45 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST75C520 数据表(HTML) 18 Page - STMicroelectronics

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VI - COMMAND SET DESCRIPTION
The appendixA containsthe description of the complete command set. Commands are presented according
to the following form :
COMMAND
Command Name Meaning
COMMAND
Opcode
Hexadecimal digit
XXXXXXXX
Synopsis
Short description of the functions performed by the command.
Parameters
Field
Byte
Pos.
Value
Definition
Name
X
b..a
xx *
Explanation of the parameter
Default value
Field
Name of the addressed bit field.
Byte
Index (or address in the dual port RAM) of the parameter byte (from 1 to 4).
Pos.
Bit field position inside the parameter byte. Can either be a single position (from 0 to 7, 0
being LSB) or a range.
Value
Possible values for the bit (resp. bit field). Range means all values are allowed. A star
means a default value. Values are expressed either under the form of a bit string, or under
hexadecimal format.
CALL
Call a Subroutine
CALL
Opcode:
19
00011001
Synopsis
CALL allows to execute a part of the ST75C520 firmware with a specific argument.
Parameters
Field
Byte
Pos.
Value
Definition
C_ADDR_L
1
7..0
Low byte of the call address
C_ADDR_H
2
7..0
High byte of the call address
C_DATA_L
3
7..0
Low byte of the argument
C_DATA_H
4
7..0
High byte of the argument
ST75C520
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