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ST75C520 Datasheet(PDF) 20 Page - STMicroelectronics |
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ST75C520 Datasheet(HTML) 20 Page - STMicroelectronics |
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20 / 45 page  CR Complex Read CR Opcode: 11 00010001 Synopsis CR allows the reading of a complex parameter. The parameter specifies the parameter address (for the real part : the imaginary part is next location). CR returns the high byte value of both real and imaginary part of the addressed complex parameter. Parameters Field Byte Pos. Value Definition CR_ADDR_L 1 7..0 Low byte of the 16-bit address CR_ADDR_H 2 7..0 High byte of the 16-bit address CSE Clear Error Status CSE Opcode: 08 00001000 Synopsis CSE is used to clear the ST75C520 error status SYSERR byte. It is also used as an acknowledge to the error condition handler. For details, please refer to the corresponding appendix. Parameters Field Byte Pos. Value Definition ERR_MASK 1 7..0 Error mask See report appendix for detailed meaning DEFT Define Arbitrary Tone DEFT Opcode: 0E 00001110 Synopsis DEFT programs one of the four tone generator for arbitrary tone generation. The parameter is the frequency of the generated tone expressed in Hertz between 0 and 3600Hz. Parameters Field Byte Pos. Value Definition TONE_GEN_SL 1 1..0 Index of the tone generator (3..0) TONE_FREQ_L 2 7..0 Low byte of the frequency TONE_FREQ_H 3 7..0 High byte of the frequency (internally masked with 0F) TONE_SCALE 4 7..0 Amplitude scaling factor (high byte) 3F gives the nominal amplitude DOSR Define Optional Status Report DOSR Opcode: 0A 00001010 Synopsis DOSR specifies the address of the RAM variables to be monitored in the 3 locations STAOPT[0..2] of the dual port RAM. It also specifies the assignment within the 3 locations. Parameters Field Byte Pos. Value Definition STA_OPT_ASS 1 1..0 0..2 Index of the STAOPT destination STA_OPT_ADL 2 7..0 Low byte of source address STA_OPT_ADH 3 3..0 High byte of source address STA_OPT_HL 3 7 0 1 Select low byte of source Select high byte of source ST75C520 20/45 |
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