參數(shù)資料
型號: TMX32C6411ZLZ
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: FIXED POINT DIGITAL SIGNAL PROCESSOR
中文描述: 定點數(shù)字信號處理器
文件頁數(shù): 114/119頁
文件大?。?/td> 1742K
代理商: TMX32C6411ZLZ
SPRS196H MARCH 2002 REVISED JULY 2004
114
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
GENERAL-PURPOSE INPUT/OUTPUT (GPIO) PORT TIMING
timing requirements for GPIO inputs
(see Figure 58)
NO.
300
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 300 MHz, use P = 3.33 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 58)
NO.
PARAMETER
300
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 300 MHz, use P = 3.33 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 58. GPIO Port Timing
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