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TMP320C2811PBKA bảng dữ liệu(PDF) 139 Page - Texas Instruments |
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TMP320C2811PBKA bảng dữ liệu(HTML) 139 Page - Texas Instruments |
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139 / 147 page ![]() Electrical Specifications 139 June 2004 SPRS257 Table 6−47. McBSP as SPI Master or Slave Timing Requirements (CLKSTP = 11b, CLKXP = 0)† NO MASTER SLAVE UNIT NO. MIN MAX MIN MAX UNIT M39 tsu(DRV-CKXH) Setup time, DR valid before CLKX high P-10 8P-10 ns M40 th(CKXH-DRV) Hold time, DR valid after CLKX high P-10 8P-10 ns M41 tsu(FXL-CKXH) Setup time, FSX low before CLKX high 16P+10 ns M42 tc(CKX) Cycle time, CLKX 2P 16P ns Table 6−48. McBSP as SPI Master or Slave Switching Characteristics (CLKSTP = 11b, CLKXP = 0)† NO PARAMETER MASTER SLAVE UNIT NO. PARAMETER MIN MAX MIN MAX UNIT M34 th(CKXL-FXL) Hold time, FSX low after CLKX low P ns M35 td(FXL-CKXH) Delay time, FSX low to CLKX high 2P ns M37 tdis(CKXL-DXHZ) Disable time, DX high impedance following last data bit from CLKX low P + 6 7P+6 ns M38 td(FXL-DXV) Delay time, FSX low to DX valid 6 4P + 6 ns † 2P = 1/CLKG For all SPI slave modes, CLKX has to be minimum 8 CLKG cycles. Also CLKG should be LSPCLK/2 by setting CLKSM = CLKGDV = 1. With maximum LSPCLK speed of 75 MHz, CLKX maximum frequency will be LSPCLK/16 , that is 4.5 MHz and P =13.3 ns. Bit 0 Bit(n-1) (n-2) (n-3) (n-4) Bit 0 Bit(n-1) (n-2) (n-3) (n-4) CLKX FSX DX DR M35 M37 M40 M39 M38 M34 LSB MSB M41 M42 Figure 6−41. McBSP Timing as SPI Master or Slave: CLKSTP = 11b, CLKXP = 0 |
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