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TMS320C31PQL60 数据表(PDF) 45 Page - Texas Instruments |
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TMS320C31PQL60 数据表(HTML) 45 Page - Texas Instruments |
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45 / 48 page ![]() TMS320C31, TMS320LC31 DIGITAL SIGNAL PROCESSORS SPRS035B – MARCH 1996 – REVISED JANUARY 1999 45 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 timer pin timing (continued) 90 90 89 Peripheral Pin (see Note A) H1 H3 88 91 92 NOTE A: HOLDA goes low in response to HOLD going low and continues to remain low until one H1 cycle after HOLD goes back high. Figure 31. Timing for Timer Pin SHZ pin timing The following table defines the timing parameter for the SHZ pin. The number shown in Figure 32 corresponds with that in the NO. column of the table below. timing parameters for SHZ (see Figure 32) NO. ’C31 ’LC31 UNIT MIN MAX 93 tdis(SHZ) Disable time, SHZ low to all O, I/O pins disabled (high impedance) 0† 2P†‡ ns † This value is characterized but not tested ‡ P = tc(CI) 93 H3 H1 SHZ All I/O Pins NOTE A: Enabling SHZ destroys TMS320C3x register and memory contents. Assert SHZ = 1 and reset the TMS320C3x to restore it to a known condition. Figure 32. Timing for SHZ |
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