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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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ST75C540 数据表(PDF) 33 Page - STMicroelectronics |
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ST75C540 数据表(HTML) 33 Page - STMicroelectronics |
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33 / 84 page  DSIT Define Status Interrupt DSIT Opcode: 13 000 10011 Synopsis DSIT specifies the bit mask used with the STATUS[0] and STATUS[1] byte to generate an interrupt IT4 to controller. Each time a bit change happens in the status words, assuming the corresponding bit mask will be set, an interrupt will be generated. Parameters Field Byte Pos. Value Definition STA_IT_MSK0 1 7..0 Status[0] bit mask pattern STA_IT_MSK1 2 7..0 Status[1] bit mask pattern Note : The default IT Status is 0x3F for STATUS[0] and 0xFF for STATUS[1]. FORM Select Transmission Format FORM Opcode: 09 000 01001 Synopsis FORM defines the type of transmission used on the line. Parameters Field Byte Pos. Value Definition X_SYNC 1 2..0 000* 001 010 011 100 Synchronous format Transmit continous “1” (1) HDLC framing Transmit continous ”0” (1) UART X_ANBIT 2 1..0 00 01 7 Bit per character 8 Bit per character X_APAR 2 3..2 00 01 10 No parity Even parity Odd parity X_ASTOP 2 5 0 1 1 stop bit (1) 2 stop bit (1) Note : 1. Valid only when transmitting. HSHK Handshake HSHK Opcode: 04 000 00100 Synopsis HSHK is used to command the ST75C530/540 to begin the transmit handshake sequence processing. The progress of the handshake is reported to the control processor. Parameter Non parametric command. VII - COMMAND SET DESCRIPTION (continued) ST75C530 - ST75C540 33/84 |
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