參數資料
型號： TMS320M642AGNZ5
廠商： Texas Instruments, Inc.
英文描述： 1A, 52kHz (250khz Max) Current Mode PWM Control Circuit with 8.4V UVLO Threshold and 96% Max Duty Cycle<sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup><sup>3</sup> ; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50
中文描述： 視頻/影像定點數字信號處理器
文件頁數： 77/123頁
文件大小： 1205K
代理商： TMS320M642AGNZ5
www.ti.com
GPyCTRL Reg
SYNC
SYSCLKOUT
Qualification
Input Signal
Qualified By 3
or 6 Samples
GPIOx
Time between samples
GPxQSEL
Number of Samples
TMS320F2808, TMS320F2806
TMS320F2801, UCD9501
Digital Signal Processors
SPRS230F–OCTOBER 2003–REVISED SEPTEMBER 2005
The user can select the type of input qualification for each GPIO pin via the GPxQSEL1/2 registers from
four choices:
Synchronization To SYSCLKOUT Only (GPxQSEL1/2=0,0): This is the default mode of all GPIO pins
at reset and it simply synchronizes the input signal to the system clock (SYSCLKOUT).
Qualification Using Sampling Window (GPxQSEL1/2=0,1 and 1,0): In this mode the input signal, after
synchronization to the system clock (SYSCLKOUT), is qualified by a specified number of cycles before
the input is allowed to change.
Figure 4-17. 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 280x 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.
Peripherals
77
相關PDF資料
PDF描述
TMS320DM642GDK500 Adjustable 2.5-36V +/-2.2% Tolerance, 1-100mA Shunt Regulator - PB Free; Package: SOIC-8 Narrow Body; No of Pins: 8; Container: Tape and Reel; Qty per Container: 2500
TMS320DM642GNZ600 Video/Imaging Fixed-Point Digital Signal Processor
TMS320DM642ZDK600 Adjustable 2.5-36V +/-2.2% Tolerance, 1-100mA Shunt Regulator; Package: TO-92 (TO-226) 5.33mm Body Height; No of Pins: 3; Container: Fan-Fold; Qty per Container: 2000
TMS320DM642ZNZ500 Video/Imaging Fixed-Point Digital Signal Processor
TMS320DM642ZNZ600 Adjustable 2.5-36V +/-2.2% Tolerance, 1-100mA Shunt Regulator; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50
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