参数资料
型号: SM320C6701W16
厂商: Texas Instruments, Inc.
元件分类: 数字信号处理
英文描述: FLOATING-POINT DIGITAL SIGNAL PROCESSOR
中文描述: 浮点数字信号处理器
文件页数: 30/64页
文件大小: 939K
代理商: SM320C6701W16
SGUS030B
APRIL 2000
REVISED MAY 2001
30
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
MIN
CLKMODE = x1
MIN
CLKMODE = x4
MIN
CLKMODE = x1
MIN
UNIT
MAX
MAX
MAX
MAX
1
tc(CLKIN)
Cycle time, CLKIN
28.4
7.1
24
6
ns
2
tw(CLKINH)
Pulse duration,
CLKIN high
*0.4C
*0.45C
*0.4C
*0.45C
ns
3
tw(CLKINL)
Pulse duration,
CLKIN low
*0.4C
*0.45C
*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
4
Figure 8. CLKIN Timings
switching characteristics for CLKOUT1
§
(see Figure 9)
NO.
PARAMETER
C6701-14
C6701-16
UNIT
CLKMODE = x4
MIN
CLKMODE = x1
MIN
MAX
MAX
1
tc(CKO1)
tw(CKO1H)
tw(CKO1L)
tt(CKO1)
Cycle time, CLKOUT1
*P
0.7
*P + 0.7
*P
0.7
*P + 0.7
ns
2
Pulse duration, CLKOUT1 high
*(P/2)
0.5
*(P/2) + 0.5
*PH
0.5
*PH + 0.5
ns
3
Pulse duration, CLKOUT1 low
*(P/2)
0.5
*(P/2) + 0.5
*PL
0.5
*PL + 0.5
ns
4
Transition time, CLKOUT1
*0.6
*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
4
2
Figure 9. CLKOUT1 Timings
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