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TMP320C2811PBKA Datasheet(PDF) 140 Page - Texas Instruments |
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TMP320C2811PBKA Datasheet(HTML) 140 Page - Texas Instruments |
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140 / 147 page ![]() Electrical Specifications 140 June 2004 SPRS257 Table 6−49. McBSP as SPI Master or Slave Timing Requirements (CLKSTP = 10b, CLKXP = 1)† NO MASTER SLAVE UNIT NO. MIN MAX MIN MAX UNIT M49 tsu(DRV-CKXH) Setup time, DR valid before CLKX high P-10 8P-10 ns M50 th(CKXH-DRV) Hold time, DR valid after CLKX high P-10 8P-10 ns M51 tsu(FXL-CKXL) Setup time, FSX low before CLKX low 8P+10 ns M52 tc(CKX) Cycle time, CLKX 2P 16P ns Table 6−50. McBSP as SPI Master or Slave Switching Characteristics (CLKSTP = 10b, CLKXP = 1)† NO PARAMETER MASTER SLAVE UNIT NO. PARAMETER MIN MAX MIN MAX UNIT M43 th(CKXH-FXL) Hold time, FSX low after CLKX high 2P ns M44 td(FXL-CKXL) Delay time, FSX low to CLKX low P ns M47 tdis(FXH-DXHZ) Disable time, DX high impedance following last data bit from FSX high 6 6P + 6 ns M48 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. M51 M50 M47 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 M44 M48 M49 M43 LSB MSB M52 Figure 6−42. McBSP Timing as SPI Master or Slave: CLKSTP = 10b, CLKXP = 1 |
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