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CS49312 Arkusz danych(PDF) 9 Page - Cirrus Logic

Numer części CS49312
Szczegółowy opis  Multi-Standard Audio Decoder Family
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Producent  CIRRUS [Cirrus Logic]
Strona internetowa  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

CS49312 Arkusz danych(HTML) 9 Page - Cirrus Logic

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CS49300 Family DSP
DS339F7
9
1.6. Switching Characteristics —
RESET
(VA, VD[3:1] = 2.5 V
±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF)
Notes: 5. The minimum RESET pulse listed above is valid only when using the recommended pull-up/pull-down
resistors on the RD, WR, PSEL and ABOOT mode pins. For Rev. D and older parts, pull-up/pull-down
resistors may be 4.7 k or 3.3 k. For Rev. E and newer parts, pull-up/pull-down resistors must be 3.3 k.
6. This specification is characterized but not production tested.
1.7. Switching Characteristics —
CLKIN
(VA, VD[3:1] = 2.5 V
±5%; Inputs: Logic 0 = DGND, Logic 1 = VD, CL = 20 pF, PLL Enabled)
Parameter
Symbol
Min
Max
Unit
RESET minimum pulse width low (-CL)
(Note 5)
Trstl
100
-
µs
RESET minimum pulse width low (-IL)
(Note 5)
Trstl
530
-
µs
All bidirectional pins high-Z after RESET low
(Note 6)
Trst2z
-100
ns
Configuration bits setup before RESET high
Trstsu
50
-
ns
Configuration bits hold after RESET high
Trsthld
15
-
ns
RESET
T
rst2z
T
rstl
T
rstsu
T
rsthld
RD, WR,
PSEL, ABOOT
All Bidirectional
Pins
Figure 1. RESET Timing
Parameter
Symbol
Min
Max
Unit
CLKIN period for internal DSP clock mode
Tclki
35
3800
ns
CLKIN high time for internal DSP clock mode
Tclkih
14
-
ns
CLKIN low time for internal DSP clock mode
Tclkil
14
-
ns
CLKIN
Tclkih
Tclkil
Tclki
Figure 2. CLKIN with CLKSEL = VSS = PLL Enable


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