ST75C520 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST75C520' PDF : 45 Pages View PDF
ST75C520
VI - COMMAND SET DESCRIPTION
The appendixA containsthe description of the complete command set. Commands are presented according
to the following form :
COMMAND
Opcode
Hexadecimal digit
Command Name Meaning
X
X
X
X
X
X
X
X
Synopsis Short description of the functions performed by the command.
COMMAND
Parameters
Field
Byte
Pos.
Value
Field
Name
Byte
X
Pos.
b..a
Value
xx *
Definition
Explanation of the parameter
Default value
Name of the addressed bit field.
Index (or address in the dual port RAM) of the parameter byte (from 1 to 4).
Bit field position inside the parameter byte. Can either be a single position (from 0 to 7, 0
being LSB) or a range.
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
Opcode:
19
Call a Subroutine
0
0
0
1
1
0
0
1
CALL
Synopsis CALL allows to execute a part of the ST75C520 firmware with a specific argument.
Parameters
Field
C_ADDR_L
C_ADDR_H
C_DATA_L
C_DATA_H
Byte
1
2
3
4
Pos.
7..0
7..0
7..0
7..0
Value
Definition
Low byte of the call address
High byte of the call address
Low byte of the argument
High byte of the argument
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