参数资料
型号: TMS320C542PGE-40
厂商: TEXAS INSTRUMENTS INC
元件分类: 数字信号处理
英文描述: 16-BIT, 100 MHz, OTHER DSP, PQFP144
封装: PLASTIC, QFP-144
文件页数: 97/111页
文件大小: 1467K
代理商: TMS320C542PGE-40
TMS320C54x, TMS320LC54x, TMS320VC54x
FIXED-POINT DIGITAL SIGNAL PROCESSORS
SPRS039C – FEBRUARY 1996 – REVISED DECEMBER 1999
86
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
reset, BIO, interrupt, and MP/MC timings
timing requirements for reset, interrupt, BIO, and MP/MC [H = 0.5 tc(CO)] (see Figure 26, Figure 27,
and Figure 28)
’C54x-40
’LC54x-40
’LC54x-50
’54x-66
UNIT
MIN
MAX
MIN
MAX
MIN
MAX
UNIT
th(RS)
Hold time, RS after CLKOUT low
0
ns
th(BIO)
Hold time, BIO after CLKOUT low
0
ns
th(INT)
Hold time, INTn, NMI, after CLKOUT low
0
ns
th(MPMC)
Hold time, MP/MC after CLKOUT low
0
ns
tw(RSL)
Pulse duration, RS low§
4H + 10
4H+10
ns
tw(BIO)S
Pulse duration, BIO low, synchronous
2H+15
2H+12
2H+10
ns
tw(BIO)A
Pulse duration, BIO low, asynchronous
4H
ns
tw(INTH)S
Pulse duration, INTn, NMI high (synchronous)
2H+15
2H+12
2H+10
ns
tw(INTH)A
Pulse duration, INTn, NMI high (asynchronous)
4H
ns
tw(INTL)S
Pulse duration, INTn, NMI low (synchronous)
2H+15
2H+12
2H+10
ns
tw(INTL)A
Pulse duration, INTn, NMI low (asynchronous)
4H
ns
tw(INTL)WKP
Pulse duration, INTn, NMI low for IDLE2/IDLE3 wakeup
10
ns
tsu(RS)
Setup time, RS before X2/CLKIN low§
5
ns
tsu(BIO)
Setup time, BIO before CLKOUT low
15
12
10
ns
tsu(INT)
Setup time, INTn, NMI, RS before CLKOUT low
15
12
10
ns
tsu(MPMC)
Setup time, MP/MC before CLKOUT low
10
ns
The external interrupts (INT0 – INT3, NMI) are synchronized to the core CPU by way of a two flip-flop synchronizer which samples these inputs
with consecutive falling edges of CLKOUT. The input to the interrupt pins is required to represent a 1–0–0 sequence at the timing that is
corresponding to three CLKOUTs sampling sequence.
If the PLL mode is selected, then at power-on sequence, or at wakeup from IDLE3, RS must be held low for at least 50
s to assure synchronization
and lock-in of the PLL.
§ Divide-by-two mode
Note that RS may cause a change in clock frequency, therefore changing the value of H (see the PLL section).
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