参数资料
型号: SM320C6701W14
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: 36/64页
文件大小: 939K
代理商: SM320C6701W14
SGUS030B
APRIL 2000
REVISED MAY 2001
36
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251
1443
SYNCHRONOUS-BURST MEMORY TIMING (CONTINUED)
timing requirements for synchronous-burst SRAM cycles (half-rate SSCLK) (see Figure 16)
NO.
C6701-14
MIN
C6701-16
MIN
UNIT
MAX
MAX
7
tsu(EDV-SSCLKH)
th(SSCLKH-EDV)
Setup time, read EDx valid before SSCLK high
3.8
3.8
ns
8
Hold time, read EDx valid after SSCLK high
1.5
1.5
ns
switching characteristics for synchronous-burst SRAM cycles
(half-rate SSCLK)
(see Figure 16 and Figure 17)
NO.
PARAMETER
C6701-14
C6701-16
UNIT
MIN
MAX
MIN
MAX
1
tosu(CEV-SSCLKH)
toh(SSCLKH-CEV)
tosu(BEV-SSCLKH)
toh(SSCLKH-BEIV)
tosu(EAV-SSCLKH)
toh(SSCLKH-EAIV)
tosu(ADSV-SSCLKH)
toh(SSCLKH-ADSV)
tosu(OEV-SSCLKH)
toh(SSCLKH-OEV)
tosu(EDV-SSCLKH)
toh(SSCLKH-EDIV)
tosu(WEV-SSCLKH)
toh(SSCLKH-WEV)
The effects of internal clock jitter are included at test. There is no need to adjust timing numbers for internal clock jitter.
When the PLL is used (CLKMODE x4), P = 1/CPU clock frequency in ns. For example, when running parts at 167 MHz, use P = 6 ns.
For CLKMODE x1:
1.5P = P + PH, where P = 1/CPU clock frequency, and PH = pulse duration of CLKIN high.
0.5P = PL, where PL = pulse duration of CLKIN low.
Output setup time, CEx valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
2
Output hold time, CEx valid after SSCLK high
0.5P
2.3
0.5P
2
ns
3
Output setup time, BEx valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
4
Output hold time, BEx invalid after SSCLK high
0.5P
2.3
0.5P
2
ns
5
Output setup time, EAx valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
6
Output hold time, EAx invalid after SSCLK high
0.5P
2.3
0.5P
2
ns
9
Output setup time, SSADS valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
10
Output hold time, SSADS valid after SSCLK high
0.5P
2.3
0.5P
2
ns
11
Output setup time, SSOE valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
12
Output hold time, SSOE valid after SSCLK high
0.5P
2.3
0.5P
2
ns
13
Output setup time, EDx valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
14
Output hold time, EDx invalid after SSCLK high
0.5P
2.3
0.5P
2.2
ns
15
Output setup time, SSWE valid before SSCLK high
1.5P
5.5
1.5P
4.5
ns
16
Output hold time, SSWE valid after SSCLK high
0.5P
2.3
0.5P
2
ns
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