參數(shù)資料
型號: TMX320C6415TGLZ
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: FIXED-POINT DIGITAL SIGNAL PROCESSORS
中文描述: 定點(diǎn)數(shù)字信號處理器
文件頁數(shù): 132/140頁
文件大?。?/td> 2033K
代理商: TMX320C6415TGLZ
SPRS226H NOVEMBER 2003 REVISED AUGUST 2005
132
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORT TIMING
timing requirements for GPIO inputs
(see Figure 62)
NO.
600
720
850
1G
UNIT
MIN
MAX
1
tw(GPIH)
tw(GPIL)
Pulse duration, GPIx high
8P
ns
2
Pulse duration, GPIx low
8P
ns
P = 1/CPU clock frequency in ns. For example, when running parts at 720 MHz, use P = 1.39 ns.
The pulse width given is sufficient to generate a CPU interrupt or an EDMA event. However, if a user wants to have the DSP recognize the GPIx
changes through software polling of the GPIO register, the GPIx duration must be extended to at least 12P to allow the DSP enough time to access
the GPIO register through the CFGBUS.
switching characteristics over recommended operating conditions for GPIO outputs
(see Figure 62)
NO.
PARAMETER
600
720
850
1G
MIN
24P 8§
24P 8§
UNIT
MAX
3
tw(GPOH)
tw(GPOL)
Pulse duration, GPOx high
ns
4
Pulse duration, GPOx low
ns
P = 1/CPU clock frequency in ns. For example, when running parts at 720 MHz, use P = 1.39 ns.
§This parameter value should not be used as a maximum performance specification. Actual performance of back-to-back accesses of the GPIO
is dependent upon internal bus activity.
GPIx
GPOx
4
3
2
1
Figure 62. GPIO Port Timing
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