參數(shù)資料
型號: TPS65920BZCHR
廠商: TEXAS INSTRUMENTS INC
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PBGA139
封裝: 10 X 10 MM, 0.65 MM PITCH, GREEN, PLASTIC, NFBGA-139
文件頁數(shù): 6/115頁
文件大小: 1232K
代理商: TPS65920BZCHR
50-msclock
50ms
Event1detectedon32K
clocksynchronizedwith
50-msclock
Event1
Debouncedafter50ms
50ms+dT
Event1
Event2
32Kclock
31 ms
Event2
Debouncedafter50ms+dT
50ms
dT
037-029
SWCS037G
– MAY 2008 – REVISED APRIL 2011
13
Debouncing Time
Table 13-1 lists the characteristics of debouncing.
Table 13-1. Debouncing
Debouncing Functions
Block
Programmable
Debouncing Time
Default
USB plug detection
USB
No
9x50 ms
0 to 250 ms
Plug/unplug detection VBUS(1)
USB
Yes
(32/32468-second
28 ms
steps)
0 to 250 ms
Plug/unplug detection ID(2)
USB
Yes
(32/32468-second
50 ms
steps)
Debouncing function interrupt generation
Power
Yes
0 to 250 ms
30 ms
debounce for VBUS and ID(3)
Hot-die detection
Thermistor
No
60
μs
60
μs
Thermal shutdown detection
No
60
μs
60
μs
PWRON(4)
Start/stop button
No
31.25 ms
NRESWARM
Button reset
No
60
μs
60
μs
SIM card plug/unplug
GPIO
Yes
0 or 30 ms
± 1 ms
0 ms
MMC1 (plug/unplug)
GPIO
Yes
0 or 30 ms
± 1 ms
0 ms
(1)
Programmable in the VBUS_DEBOUNCE register
(2)
Programmable in the ID_DEBOUNCE register
(3)
Programmable in the RESERVED_E[2:0] CFG_VBUSDEB register
(4)
The PWRON signal is debounced 1024*CLK32K (maximum 1026*CLK32K) falling edge in master mode.
Figure 13-1 is a sample debouncing sequence chronogram.
Figure 13-1. Debouncing Sequence Chronogram Example
Event1 is correctly debounced after 5 ms. Event2 is debounced after 50ms + dT because the capture of
the event is considered after the next rising edge of the 50-ms clock.
Copyright
2008–2011, Texas Instruments Incorporated
Debouncing Time
103
focus.ti.com: TPS65930/TPS65920
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