参数资料
型号: SM320C6701GLPW16
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 32-BIT, 167 MHz, OTHER DSP, CBGA429
封装: CERAMIC, BGA-429
文件页数: 40/62页
文件大小: 873K
代理商: SM320C6701GLPW16
SMJ320C6701
FLOATINGPOINT DIGITAL SIGNAL PROCESSOR
SGUS030A – APRIL 2000 – REVISED APRIL 2001
45
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
EXTERNAL INTERRUPT/RESET TIMING
timing requirements for interrupt response cycles (see Figure 26)
NO.
’C6701-14
’C6701-16
UNIT
NO.
MIN
MAX
UNIT
2
tw(ILOW)
Width of the interrupt pulse low
*2P
ns
3
tw(IHIGH)
Width of the interrupt pulse high
*2P
ns
Interrupt signals are synchronized internally and are potentially recognized one cycle later if setup and hold times are violated. Thus, they can
be connected to asynchronous inputs.
P = 1/CPU clock frequency in ns. For example, when running parts at 167 MHz, use P = 6 ns.
*This parameter is not tested.
switching characteristics during interrupt response cycles§ (see Figure 26)
NO.
PARAMETER
’C6701-14
’C6701-16
UNIT
NO.
PARAMETER
MIN
MAX
UNIT
1
tR(EINTH-IACKH)
Response time, EXT_INTx high to IACK high
9P
ns
4
td(CKO2L-IACKV)
Delay time, CLKOUT2 low to IACK valid
–0.5P
13 – 0.5P
ns
5
td(CKO2L-INUMV)
Delay time, CLKOUT2 low to INUMx valid
10 – 0.5P
ns
6
td(CKO2L-INUMIV) Delay time, CLKOUT2 low to INUMx invalid
–0.5P
ns
§ P = 1/CPU clock frequency in ns. For example, when running parts at 167 MHz, use P = 6 ns.
When the PLL is used (CLKMODE x4), 0.5P = 1/(2
× CPU clock frequency).
For CLKMODE x1: 0.5P = PH, where PH is the high period of CLKIN.
Interrupt Number
6
5
4
3
2
CLKOUT2
EXT_INTx, NMI
1
Intr Flag
IACK
INUMx
Figure 26. Interrupt Timing
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