TMP320C6720RFP300 datasheet(79/118 Pages) TI

79 / 118 page

TMS320C6727B, TMS320C6726B, TMS320C6722B, TMS320C6720

Floating-Point Digital Signal Processors

www.ti.com

SPRS370E – SEPTEMBER 2006 – REVISED JULY 2008

Table 4-25. McASP Switching Characteristics(1)

NO.

PARAMETER

MIN

MAX

UNIT

Cycle time, AHCLKR internal, AHCLKR output

Cycle time, AHCLKR external, AHCLKR output

tc(AHCKRX)

Cycle time, AHCLKX internal, AHCLKX output

Cycle time, AHCLKX external, AHCLKX output

Pulse duration, AHCLKR internal, AHCLKR output

(AHR/2) – 2.5(2)

Pulse duration, AHCLKR external, AHCLKR output

(AHR/2) – 2.5(2)

tw(AHCKRX)

Pulse duration, AHCLKX internal, AHCLKX output

(AHX/2) – 2.5(3)

Pulse duration, AHCLKX external, AHCLKX output

(AHX/2) – 2.5(3)

Cycle time, ACLKR internal, ACLKR output

greater of 2P or 20 ns(4)

Cycle time, ACLKR external, ACLKR output

greater of 2P or 20 ns(4)

tc(ACKRX)

Cycle time, ACLKX internal, ACLKX output

greater of 2P or 20 ns(4)

Cycle time, ACLKX external, ACLKX output

greater of 2P or 20 ns(4)

Pulse duration, ACLKR internal, ACLKR output

(AR/2) – 2.5(5)

Pulse duration, ACLKR external, ACLKR output

(AR/2) – 2.5(5)

tw(ACKRX)

Pulse duration, ACLKX internal, ACLKX output

(AX/2) – 2.5(6)

Pulse duration, ACLKX external, ACLKX output

(AX/2) – 2.5(6)

Delay time, ACLKR internal, AFSR output

Delay time, ACLKX internal, AFSX output

Delay time, ACLKR external input, AFSR output

Delay time, ACLKX external input, AFSX output

Delay time, ACLKR external output, AFSR output

Delay time, ACLKX external output, AFSX output

td(ACKRX-FRX)

Delay time, ACLKR internal, AFSR output

–1

Delay time, ACLKX internal, AFSX output

–1

Delay time, ACLKR external input, AFSR output

Delay time, ACLKX external input, AFSX output

Delay time, ACLKR external output, AFSR output

Delay time, ACLKX external output, AFSX output

Delay time, ACLKX internal, AXRn output

–1

td(ACLKX-AXRV)

Delay time, ACLKX external input, AXRn output

Delay time, ACLKX external output, AXRn output

Disable time, ACLKX internal, AXRn output

–3

tdis(ACKX-AXRHZ)

Disable time, ACLKX external input, AXRn output

–3

Disable time, ACLKX external output, AXRn output

–3

(1)

ACLKX internal – ACLKXCTL.CLKXM = 1, PDIR.ACLKX = 1

ACLKX external input – ACLKXCTL.CLKXM = 0, PDIR.ACLKX = 0

ACLKX external output – ACLKXCTL.CLKXM = 0, PDIR.ACLKX = 1

ACLKR internal – ACLKRCTL.CLKRM = 1, PDIR.ACLKR =1

ACLKR external input – ACLKRCTL.CLKRM = 0, PDIR.ACLKR = 0

ACLKR external output – ACLKRCTL.CLKRM = 0, PDIR.ACLKR = 1

(2)

AHR - Cycle time, AHCLKR.

(3)

AHX - Cycle time, AHCLKX.

(4)

P = SYSCLK2 period

(5)

AR - ACLKR period.

(6)

AX - ACLKX period.

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