參數(shù)資料
型號: SM320C30HFGM50
廠商: TEXAS INSTRUMENTS INC
元件分類: 數(shù)字信號處理
英文描述: 32-BIT, 50 MHz, OTHER DSP, CQFP196
封裝: NONCONDUCTIVE TIE BAR, CERAMIC, QFP-196
文件頁數(shù): 19/48頁
文件大?。?/td> 874K
代理商: SM320C30HFGM50
SMJ320C30
DIGITAL SIGNAL PROCESSOR
SGUS014H -- FEBRUARY 1991 -- REVISED JUNE 2004
26
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251--1443
changing XFx from an output to an input
The following table defines the timing parameters for changing the XFx pin from an output pin to an input pin.
timing parameters of XFx changing from output to input mode (see Figure 18)
NO
320C30-40
320C30-50
UNIT
NO.
MIN
MAX
MIN
MAX
UNIT
46
td(H3H-XFx)
Delay time, XFx after H3 high
13*
12*
ns
47
tsu(XFx-H1L)
Setup time, XFx before H1 low
9
ns
48
th(H1L-XFx)
Hold time, XFx after H1 low
0
ns
Numbers in this column match those used in Figure 18.
* This parameter is not production tested.
Execute
Load of IOF
H3
H1
XFx
INXFx Bit
(see Note A)
I/OXFx Bit
(see Note A)
46
47
48
Data
Sampled
Data
Seen
Output
Value on
Terminal
Seen in IOF
Synchronizer
Delay
Buffers Go
From Output
to Input
NOTE A: I/OXFx represents either bit 1 or bit 5 of the IOF register, and INXFx represents either bit 3 or bit 7 of the IOF register depending on
whether XF0 or XF1, respectively, is being affected.
Figure 18. Timing for Change of XFx From Output to Input Mode
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