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数据搜索系统，热门电子元器件搜索 |
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T80C5112-RKFCL 数据表(PDF) 48 Page - ATMEL Corporation |
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T80C5112-RKFCL 数据表(HTML) 48 Page - ATMEL Corporation |
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48 / 97 page  48 Rev. B - November 10, 2000 Preliminary T80C5112 12.4.5.3. Serial Peripheral DATa register (SPDAT) The Serial Peripheral Data Register (Table 25) is a read/write buffer for the receive data register. A write to SPDAT places data directly into the shift register. No transmit buffer is available in this model. A Read of the SPDAT returns the value located in the receive buffer and not the content of the shift register. Table 25. Serial Peripheral Data Register Reset Value= XXXX XXXXb R7:R0 : Receive data bits SPCON, SPSTA and SPDAT registers may be read and written at any time while there is no on-going exchange. However, special care should be taken when writing to them while a transmission is on-going: · Do not change SPR2, SPR1 and SPR0 · Do not change CPHA and CPOL · Do not change MSTR · Clearing SPEN would immediately disable the peripheral · Writing to the SPDAT will cause an overflow 7 6 5 4 3 2 1 0 R7 R6 R5 R4 R3 R2 R1 R0 |
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