參數(shù)資料
型號: 951200201
廠商: ATMEL CORP
元件分類: 數(shù)字信號處理外設(shè)
英文描述: 40-BIT, DSP-FLOATING POINT PROCESSOR, QFP256
封裝: MQFP-256
文件頁數(shù): 38/50頁
文件大?。?/td> 702K
代理商: 951200201
43
TSC21020F
4153H–AERO–04/07
Figure 18. Typical Output Delay or Hold vs. Load Capacitance (at Maximum Case
Temperature)
Figure 19. Typical Output Delay or Hold vs. Load Capacitance (at Maximum Case
Temperature)
Power Dissipation
Total power dissipation has two components: one due to internal circuitry and one due
to the switching of external output drivers.
Internal power dissipation is dependent on the instruction execution sequence and the
data values involved. Internal power dissipation is calculated in the following way:
PINT = IDDIN x VDD
The external component of total power dissipation is caused by the switching of output
pins. Its magnitude depends on:
1) the number of output pins that switch during each cycle(O),
2) the maximum frequency at which they can switch (f),
3) their load capacitance (C), and
–2
0
2
4
6
8
10
12
25
50
75
100
125
150
175
200
OUTPUT
DELA
Y
OR
HOLD
ns
LOAD CAPACITANCE – pF
Note:
(1) OUTPUT PINS BG, TIMEXP, FLAG3–0,
PMD47–0, DMD39–0
(1)
8.3
–1.7
–3
–2
–1
0
1
2
3
4
25
50
75
100
125
150
175
200
OUTPUT
DELA
Y
OR
HOLD
ns
LOAD CAPACITANCE – pF
Note:
(1) OUTPUT PINS PMA–23, PMS1–0, PMPAGE, DMA31–0,
DMS3–0, DMPAGE, TDO, PMRD, PMWR, DMRD, DMWR
–2.2
(1)
2.8
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