參數(shù)資料
型號： TMS320F28335_1
廠商： Texas Instruments, Inc.
英文描述： Variable Capacitance Diode for TV Tuner VHF Tuning; Ratings VR (V): 32; Characteristics n: 12.0 min; Characteristics rs (ohm) max: 0.85; Characteristics C (pF) max: C2 = 32.2 to 37.5 C25 = 2.57 to 3.0; Characteristics CVR/CVR: 2/25; Cl: 2.777; Package: UFP
中文描述： 數(shù)字信號控制器（DSC）
文件頁數(shù)： 98/166頁
文件大小： 1889K
代理商： TMS320F28335_1
www.ti.com
A
GPyCTRL Reg
SYNC
SYSCLKOUT
Qualification
Input Signal
Qualified By 3
or 6 Samples
GPIOx
Time between samples
GPxQSEL
Number of Samples
4.14 External Interface (XINTF)
TMS320F28335, TMS320F28334, TMS320F28332
Digital Signal Controllers (DSCs)
SPRS439B–JUNE 2007–REVISED OCTOBER 2007
Figure 4-19. Qualification Using Sampling Window
The sampling period is specified by the QUALPRD bits in the GPxCTRL register and is configurable in
groups of 8 signals. It specifies a multiple of SYSCLKOUT cycles for sampling the input signal. The
sampling window is either 3-samples or 6-samples wide and the output is only changed when ALL
samples are the same (all 0s or all 1s) as shown in Figure 4-18 (for 6 sample mode).
No Synchronization (GPxQSEL1/2=1,1): This mode is used for peripherals where synchronization is
not required (synchronization is performed within the peripheral).
Due to the multi-level multiplexing that is required on the F2833x device, there may be cases where a
peripheral input signal can be mapped to more then one GPIO pin. Also, when an input signal is not
selected, the input signal will default to either a 0 or 1 state, depending on the peripheral.
This section gives a top-level view of the external interface (XINTF) that is implemented on the F2833x
devices.
The XINTF is a non-multiplexed asynchronous bus, similar to the 2812 XINTF. The XINTF on the F2833x
is mapped into three fixed zones shown in
Figure 4-20
.
Peripherals
98
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