參數(shù)資料
型號: SM320F2812HFGM
廠商: TEXAS INSTRUMENTS INC
元件分類: 數(shù)字信號處理
英文描述: 16-BIT, 150 MHz, OTHER DSP, CQFP172
封裝: NCTB, CERAMIC, QFP-172
文件頁數(shù): 26/147頁
文件大小: 1721K
代理商: SM320F2812HFGM
Electrical Specifications
121
December 2004
SGUS053
tsu(XD)XRD
Lead
Active
Trail
DIN
td(XCOH-XZCSL)
td(XCOH-XA)
td(XCOHL-XRDL)
td(XCOHL-XZCSH)
td(XCOHL-XRDH)
WS (Asynch)
XCLKOUT=XTIMCLK
XCLKOUT=1/2 XTIMCLK
XZCS0AND1, XZCS2,
XZCS6AND7
XA[0:18]
XRD
XWE
XR/W
XD[0:15]
XREADY(Asynch)
NOTES: A. All XINTF accesses (lead period) begin on the rising edge of XCLKOUT. When necessary, the device will insert an alignment
cycle before an access to meet this requirement.
B. During alignment cycles, all signals will transition to their inactive state.
C. During inactive cycles, the XINTF address bus will always hold the last address put out on the bus. This includes alignment
cycles.
D. For each sample, setup time from the beginning of the access can be calculated as:
D = (XRDLEAD + XRDACTIVE 3 +n) tc(XTIM) tsu(XRDYasynchL)XCOHL
where n is the sample number: n = 1, 2, 3, and so forth.
E. Reference for the first sample is with respect to this point:
E = (XRDLEAD + XRDACTIVE 2) tc(XTIM)
tsu(XRDYasynchL)XCOHL
ta(XRD)
ta(A)
th(XRDYasynchL)
th(XD)XRD
th(XRDYasynchH)XZCSH
= Don’t care. Signal can be high or low during this time.
Legend:
SeeNotes
A and B
See Note C
tsu(XRDYasynchH)XCOHL
See Note D
See Note E
te(XRDYasynchH)
Figure 631. Example Read With Asynchronous XREADY Access
XTIMING register parameters used for this example:
XRDLEAD
XRDACTIVE
XRDTRAIL
USEREADY
X2TIMING
XWRLEAD
XWRACTIVE
XWRTRAIL
READYMODE
≥1
3
≥1
1
0
N/A
1 = XREADY
(Asynch)
N/A = “Don’t care” for this example
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