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CS4926 Scheda tecnica(PDF) 10 Page - Cirrus Logic |
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CS4926 Scheda tecnica(HTML) 10 Page - Cirrus Logic |
10 / 56 page CS4923/4/5/6/7/8/9 10 DS262F2 SWITCHING CHARACTERISTICS—MOTOROLA® HOST MODE (TA = 25 °C; VA, VD = 3.3 V ±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF) Notes: 3. Certain timing parameters are normalized to the DSP clock, DCLK, in nanoseconds. The DSP clock can be defined as follows: External CLKIN Mode: DCLK == CLKIN/3 before and during boot DCLK == CLKIN after boot Internal Clock Mode: DCLK == 10MHz before and during boot, i.e. DCLK == 100ns DCLK == 60 MHz after boot, i.e. DCLK == 16.7ns (this speed may depend on CLKIN, please see CS4923/4/5/6/7/8/9 Hardware Users Guide for more information) 4. This specification is characterized but not production tested. Parameter Symbol Min Max Unit Address setup before CS and DS low Tmas 5- ns Address hold time after CS and DS low Tmah 5- ns Delay between DS then CS low or CS then DS low Tmcdr 0 ∞ ns Data valid after CS and DS low with R/W high Tmdd -20 ns CS and DS low for read (Note 3) Tmrpw DCLK + 10 - ns Data hold time after CS or DS high after read Tmdhr 5- ns Data high-Z after CS or DS high low after read (Note 4) Tmdis -15 ns CS or DS high to CS and DS low for next read (Note 3) Tmrd 2*DCLK + 10 - ns CS or DS high to CS and DS low for next write (Note 3) Tmrdtw 2*DCLK + 10 - ns Delay between DS then CS low or CS then DS low Tmcdw 0 ∞ ns Data setup before CS or DS high Tmdsu 20 - ns CS and DS low for write (Note 3) Tmwpw DCLK + 10 - ns R/W setup before CS or DS low Tmrwsu 5- ns R/W hold time after CS or DS high Tmrwhld 5- ns Data hold after CS or DS high Tmdhw 5- ns CS or DS high to CS and DS low with R/W high for next read (Note 3) Tmwtrd 2*DCLK + 10 - ns CS or DS high to CS and DS low for next write (Note 3) Tmwd 2*DCLK + 10 - ns |
Codice articolo simile - CS4926 |
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Descrizione simile - CS4926 |
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