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): 137/166頁
文件大?。?/td> 1889K
代理商: TMS320F28335_1
www.ti.com
A
TMS320F28335, TMS320F28334, TMS320F28332
Digital Signal Controllers (DSCs)
SPRS439B–JUNE 2007–REVISED OCTOBER 2007
6.10.7.3
Asynchronous Mode (USEREADY = 1, READYMODE = 1)
If the XREADY signal is sampled in the asynchronous mode (USEREADY = 1, READYMODE = 1), then:
1
Lead:
LR
≥ ×
t
c(XTIM)
LW
t
c(XTIM)
AR
2
×
t
c(XTIM)
AW
2
×
t
c(XTIM)
2
Active:
3
Lead + Active: LR + AR
4
×
t
c(XTIM)
LW + AW
4
×
t
c(XTIM)
NOTE
Restrictions do not include external hardware wait states.
These requirements result in the following XTIMING register configuration restrictions:
XRDLEAD
1
XRDACTIVE
2
XRDTRAIL
0
XWRLEAD
1
XWRACTIVE
2
XWRTRAIL
0
X2TIMING
0, 1
or
XRDLEAD
2
XRDACTIVE
1
XRDTRAIL
0
XWRLEAD
2
XWRACTIVE
1
XWRTRAIL
0
X2TIMING
0, 1
Examples of valid and invalid timing when using asynchronous XREADY:
XRDLEAD
0
1
1
1
1
2
XRDACTIVE
0
0
1
1
2
1
XRDTRAIL
0
0
0
0
0
0
XWRLEAD
0
1
1
1
1
2
XWRACTIVE
0
0
1
1
2
1
XWRTRAIL
0
0
0
0
0
0
X2TIMING
0, 1
0, 1
0
1
0, 1
0, 1
Invalid
(1)
Invalid
(1)
Invalid
(1)
Valid
Valid
Valid
(1)
No hardware to detect illegal XTIMING configurations
Unless otherwise specified, all XINTF timing is applicable for the clock configurations shown in
Table 6-38
.
Table 6-38. XINTF Clock Configurations
MODE
1
Example:
2
Example:
3
Example:
4
Example:
SYSCLKOUT
XTIMCLK
SYSCLKOUT
150 MHz
SYSCLKOUT
150 MHz
1/2 SYSCLKOUT
75 MHz
1/2 SYSCLKOUT
75 MHz
XCLKOUT
SYSCLKOUT
150 MHz
1/2 SYSCLKOUT
75 MHz
1/2 SYSCLKOUT
75 MHz
1/4 SYSCLKOUT
37.5 MHz
150 MHz
150 MHz
150 MHz
150 MHz
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