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AM1808AZCED3 Datasheet(PDF) 136 Page - Texas Instruments |
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AM1808AZCED3 Datasheet(HTML) 136 Page - Texas Instruments |
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136 / 264 page ![]() AM1808 SPRS653A – FEBRUARY 2010 – REVISED APRIL 2010 www.ti.com Table 6-53. Timing Requirements for McASP0 (1.0V)(1) (2) 1.0V NO. PARAMETER UNIT MIN MAX 1 tc(AHCLKRX) Cycle time, AHCLKR/X 35 ns 2 tw(AHCLKRX) Pulse duration, AHCLKR/X high or low 17.5 ns 3 tc(ACLKRX) Cycle time, ACLKR/X AHCLKR/X ext 35(3) ns 4 tw(ACLKRX) Pulse duration, ACLKR/W high or low AHCLKR/X ext 17.5 ns AHCLKR/X int 16 ns Setup time, 5 tsu(AFSRX-ACLKRX) AHCLKR/X ext input 5.5 ns AFSR/X input to ACLKR/X (4) AHCLKR/X ext output 5.5 ns AHCLKR/X int -2 ns Hold time, 6 th(ACLKRX-AFSRX) AHCLKR/X ext input 1 ns AFSR/X input after ACLKR/X(4) AHCLKR/X ext output 1 ns AHCLKR/X int 16 ns Setup time, 7 tsu(AXR-ACLKRX) AXR0[n] input to ACLKR/X(4) (5) AHCLKR/X ext 5.5 ns AHCLKR/X int -2 ns Hold time, 8 th(ACLKRX-AXR) AHCLKR/X ext input 5 ns AXR0[n] input after ACLKR/X(4) (5) AHCLKR/X ext output 5 ns (1) ACLKX0 internal – McASP0 ACLKXCTL.CLKXM = 1, PDIR.ACLKX = 1 ACLKX0 external input – McASP0 ACLKXCTL.CLKXM = 0, PDIR.ACLKX = 0 ACLKX0 external output – McASP0 ACLKXCTL.CLKXM = 0, PDIR.ACLKX = 1 ACLKR0 internal – McASP0 ACLKRCTL.CLKRM = 1, PDIR.ACLKR =1 ACLKR0 external input – McASP0 ACLKRCTL.CLKRM = 0, PDIR.ACLKR = 0 ACLKR0 external output – McASP0 ACLKRCTL.CLKRM = 0, PDIR.ACLKR = 1 (2) P = SYSCLK2 period (3) This timing is limited by the timing shown or 2P, whichever is greater. (4) McASP0 ACLKXCTL.ASYNC=1: Receiver is clocked by its own ACLKR0 (5) McASP0 ACLKXCTL.ASYNC=0: Receiver is clocked by transmitter's ACLKX0 136 Peripheral Information and Electrical Specifications Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): AM1808 |
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