參數(shù)資料
型號： SM320C6701GLPS14
廠商： TEXAS INSTRUMENTS INC
元件分類： 數(shù)字信號處理
英文描述： 32-BIT, 140 MHz, OTHER DSP, CBGA429
封裝： CERAMIC, BGA-429
文件頁數(shù)： 24/62頁
文件大?。?/td> 873K
代理商： SM320C6701GLPS14
SMJ320C6701
FLOATINGPOINT DIGITAL SIGNAL PROCESSOR
SGUS030A – APRIL 2000 – REVISED APRIL 2001
30
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
INPUT AND OUTPUT CLOCKS
timing requirements for CLKIN (see Figure 8)
’C6701-14
’C6701-16
NO.
CLKMODE = x4
CLKMODE = x1
CLKMODE = x4
CLKMODE = x1
UNIT
NO.
MIN
MAX
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
1
tc(CLKIN)
Cycle time, CLKIN
28.4
7.1
24
6
ns
2
tw(CLKINH)
Pulse duration,
CLKIN high
*10.9
*3
*0.4C
*0.45C
ns
3
tw(CLKINL)
Pulse duration,
CLKIN low
*10.9
*3
*0.4C
*0.45C
ns
4
tt(CLKIN)
Transition time, CLKIN
*5
*0.6
*5
*0.6
ns
The reference points for the rise and fall transitions are measured at 20% and 80%, respectively, of VIH.
C = CLKIN cycle time in ns. For example, when CLKIN frequency is 10 MHz, use C = 100 ns.
*This parameter is not tested.
CLKIN
1
2
3
4
Figure 8. CLKIN Timings
switching characteristics for CLKOUT1§ (see Figure 9)
NO
PARAMETER
’C6701-14
’C6701-16
UNIT
NO.
PARAMETER
CLKMODE = x4
CLKMODE = x1
UNIT
MIN
MAX
MIN
MAX
1
tc(CKO1)
Cycle time, CLKOUT1
*P – 0.7
*P + 0.7
*P – 0.7
*P + 0.7
ns
2
tw(CKO1H)
Pulse duration, CLKOUT1 high
*(P/2) – 0.5
*(P/2) + 0.5
*PH – 0.5
*PH + 0.5
ns
3
tw(CKO1L)
Pulse duration, CLKOUT1 low
*(P/2) – 0.5
*(P/2) + 0.5
*PL – 0.5
*PL + 0.5
ns
4
tt(CKO1)
Transition time, CLKOUT1
*0.6
ns
P = 1/CPU clock frequency in nanoseconds (ns).
§ PH is the high period of CLKIN in ns and PL is the low period of CLKIN in ns.
*This parameter is not tested.
CLKOUT1
1
3
4
2
Figure 9. CLKOUT1 Timings
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