參數(shù)資料
型號(hào): PCM3003EG4
元件分類: Codec
英文描述: 16/20-BIT SINGLE-ENDED ANALOG INPUT/OUTPUT STEREO AUDIO CODECS
中文描述: 16/20-BIT單端模擬輸入/輸出立體聲編解碼器
文件頁(yè)數(shù): 23/39頁(yè)
文件大小: 515K
代理商: PCM3003EG4
www.ti.com
t
(SCKH)
SYSCLK
0.3 V
DD
0.7 V
DD
t
(SCKL)
1/256 f
S
,
1/384 f
S
,
or 1/512 f
S
H
L
T0005-05
POWER-ON RESET
1024 System Clock Periods
Reset
Reset Removal
2.4 V
2.2 V
2.0 V
V
DD
Internal Reset
System Clock
T0014-03
3 Clocks Minimum
PCM3002
PCM3003
SBAS079A–OCTOBER 2000–REVISED OCTOBER 2004
Figure 44. System Clock Timing
System clock pulse duration, HIGH
System clock pulse duration, LOW
t
(SCKH)
t
(SCKL)
12 ns (min)
12 ns (min)
Both the PCM3002 and PCM3003 have internal power-on reset circuitry. Power-on reset occurs when the
system clock (SYSCLK) is active and V
DD
> 2.2 V. For the PCM3003, the SYSCLK must complete a minimum of
three complete cycles prior to V
DD
> 2.2 V to ensure proper reset operation. The initialization sequence requires
1024 SYSCLK cycles for completion, as shown in Figure 45. Figure 46 shows the state of the DAC and ADC
outputs during and after the reset sequence.
Figure 45. Internal Power-On Reset Timing
23
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