參數(shù)資料
型號(hào)： 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(hào)控制器（DSC）
文件頁數(shù)： 121/166頁
文件大小： 1889K
代理商： TMS320F28335_1
www.ti.com
A
6.9.2
GPIO - Input Timing
GPIO Signal
1
Sampling Window
Output From
Qualifier
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
SYSCLKOUT
QUALPRD = 1
(SYSCLKOUT/2)
(SYSCLKOUT cycle * 2 * QUALPRD) * 5
(C)
)
(A)
GPxQSELn = 1,0 (6 samples)
Sampling Period determined
by GPxCTRL[QUALPRD]
(B)
(D)
t
w(SP)
t
w(IQSW)
TMS320F28335, TMS320F28334, TMS320F28332
Digital Signal Controllers (DSCs)
SPRS439B–JUNE 2007–REVISED OCTOBER 2007
A.
This glitch will be ignored by the input qualifier. The QUALPRD bit field specifies the qualification sampling period. It
can vary from 00 to 0xFF. If QUALPRD = 00, then the sampling period is 1 SYSCLKOUT cycle. For any other value
"n", the qualification sampling period in 2n SYSCLKOUT cycles (i.e., at every 2n SYSCLKOUT cycles, the GPIO pin
will be sampled).
The qualification period selected via the GPxCTRL register applies to groups of 8 GPIO pins.
The qualification block can take either three or six samples. The GPxQSELn Register selects which sample mode is
used.
In the example shown, for the qualifier to detect the change, the input should be stable for 10 SYSCLKOUT cycles or
greater. In other words, the inputs should be stable for (5 x QUALPRD x 2) SYSCLKOUT cycles. This would ensure
5 sampling periods for detection to occur. Since external signals are driven asynchronously, an 13-SYSCLKOUT-wide
pulse ensures reliable recognition.
B.
C.
D.
Figure 6-10. Sampling Mode
Table 6-14. General-Purpose Input Timing Requirements
MIN
MAX
UNIT
cycles
cycles
cycles
cycles
cycles
QUALPRD = 0
QUALPRD
≠
0
1t
c(SCO)
t
w(SP)
Sampling period
2t
c(SCO)
* QUALPRD
t
w(SP)
* (n
(1)
– 1)
t
w(IQSW)
Input qualifier sampling window
Synchronous mode
With input qualifier
2t
c(SCO)
t
w(GPI)(2)
Pulse duration, GPIO low/high
t
w(IQSW)
+ t
w(SP)
+ 1t
c(SCO)
(1)
(2)
"n" represents the number of qualification samples as defined by GPxQSELn register.
For t
w(GPI)
, pulse width is measured from V
IL
to V
IL
for an active low signal and V
IH
to V
IH
for an active high signal.
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Electrical Specifications
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參數(shù)描述
TMS320F28335PGFA 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC Digital Signal Controller RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320F28335PGFA 制造商:Texas Instruments 功能描述:IC DSC 32BIT 512KB 150MHZ 1.995V LQFP176
TMS320F28335PTPQ 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC Delfino Micrcntrlr RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320F28335PTPS 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC Delfino Micrcntrlr RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
TMS320F28335ZHHA 功能描述:數(shù)字信號(hào)處理器和控制器 - DSP, DSC Digital Signal Controller RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時(shí)鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時(shí)器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT
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