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ST75C520 Datasheet(PDF) 18 Page - STMicroelectronics |
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ST75C520 Datasheet(HTML) 18 Page - STMicroelectronics |
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18 / 45 page  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 18/45 |
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