Motorola TMS320C6711D Manual de usuario descargar pdf (Pagina 97)

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SPRS292 − OCTOBER 2005

POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443

MULTICHANNEL BUFFERED SERIAL PORT TIMING (CONTINUED)

Bit 0 Bit(n-1) (n-2) (n-3) (n-4)

376

CLKX

FSX

Figure 49. McBSP Timing as SPI Master or Slave: CLKSTP = 11b, CLKXP = 0

timing requirements for McBSP as SPI master or slave: CLKSTP = 10b, CLKXP = 1

†‡

(see Figure 50)

NO.

GDPA-167

ZDPA−167

−200

−250

UNIT

NO.

MASTER SLAVE

UNIT

MIN MAX MIN MAX

4 t

su(DRV-CKXH)

Setup time, DR valid before CLKX high 12 2 − 6P ns

5 t

h(CKXH-DRV)

Hold time, DR valid after CLKX high 4 5 + 12P ns

†

P = 1/CPU clock frequency in ns. For example, when running parts at 250 MHz, use P = 4 ns.

‡

For all SPI slave modes, CLKG is programmed as 1/2 of the CPU clock by setting CLKSM = CLKGDV = 1.

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Motorola TMS320C6711D Manual de usuario Pagina 97