參數資料
型號: SM320C6701GJCA16EP
廠商: TEXAS INSTRUMENTS INC
元件分類: 數字信號處理
英文描述: 32-BIT, 166.67 MHz, OTHER DSP, PBGA352
封裝: 35 X 35 MM, PLASTIC, BGA-352
文件頁數: 39/62頁
文件大?。?/td> 894K
代理商: SM320C6701GJCA16EP
SM320C6701EP, SM320C6701MECHEP
FLOATINGPOINT DIGITAL SIGNAL PROCESSOR
SGUS042A MAY 1998 REVISED APRIL 2004
44
POST OFFICE BOX 1443
HOUSTON, TEXAS 772511443
EXTERNAL INTERRUPT TIMING
timing requirements for interrupt response cycles (see Figure 26)
NO.
C6701-120
C6701-167
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.
switching characteristics during interrupt response cycles§ (see Figure 26)
NO.
PARAMETER
C6701-120
C6701-167
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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