參數(shù)資料
型號: TAS5508BPAGR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP64
封裝: GREEN, PLASTIC, TQFP-64
文件頁數(shù): 57/103頁
文件大?。?/td> 1198K
代理商: TAS5508BPAGR
4.7.5
Reset Timing (RESET)
tw(RESET)
Earliest time
that PWM outputs
could be enabled
RESET
VALID
td(PWM_off) 3 370 ns
td(I2C_ready)
Start system
td(run)
Determine SCLK rate
and MCLK ratio. Enable via I2C.
T0029-04
4.7.6
Power-Down (PDN) Timing
PDN
VALID
tsu
td(PWM_off) < 300 s
T0030-03
TAS5508B
8-Channel Digital Audio PWM Processor
www.ti.com
SLES162C – DECEMBER 2005 – REVISED JULY 2009
Control signal parameters over recommended operating conditions (unless otherwise noted)
PARAMETER
MIN
TYP
MAX
UNIT
td(PWM_off)
Time from reset to PWM_EN low (PWM outputs disabled)
370
ns
tw(RESET)
Pulse duration, RESET active
400
ns
td(I2C_ready)
Time to enable I2C
3
ms
td(run)
Device start-up time
10
ms
NOTE: Because a crystal time base is used, the system determines the CLK rates. Once the data rate and master clock ratio
is determined, the system outputs audio if a master volume command is issued at the beginning of td(run).
Figure 4-5. Reset Timing
Control signal parameters over recommended operating conditions (unless otherwise noted)
PARAMETER
MIN
TYP
MAX
UNIT
td(PWM_off)
Time from reset to PWM_EN low (PWM outputs disabled)
300
s
Number of MCLKs preceding the release of PDN
5
tsu
Device start-up time
120
ms
Figure 4-6. Power-Down Timing
Electrical Specifications
57
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