參數(shù)資料
型號(hào): SPAKDSP321VL275
廠(chǎng)商: Freescale Semiconductor
文件頁(yè)數(shù): 36/84頁(yè)
文件大?。?/td> 0K
描述: IC DSP 24BIT 275MHZ 196-MAPBGA
標(biāo)準(zhǔn)包裝: 126
系列: DSP56K/Symphony
類(lèi)型: 定點(diǎn)
接口: 主機(jī)接口,SSI,SCI
時(shí)鐘速率: 275MHz
非易失內(nèi)存: ROM(576 B)
芯片上RAM: 576kB
電壓 - 輸入/輸出: 3.30V
電壓 - 核心: 1.60V
工作溫度: -40°C ~ 100°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 196-LBGA
供應(yīng)商設(shè)備封裝: 196-MAPBGA(15x15)
包裝: 托盤(pán)
AC Electrical Characteristics
DSP56321 Technical Data, Rev. 11
Freescale Semiconductor
2-21
2.4.7
SCI Timing
Table 2-11.
SCI Timings
No.
Characteristics1
Symbol
Expression
200 MHz
220 MHz
240 MHz
275 MHz
Uni
t
Min
Max
Min
Max
Min
Max
Min
Max
400
Synchronous clock cycle
tSCC
2
16
× TC
80.0
72.8
66.7
58.0
ns
401
Clock low period
tSCC/2 10.0
30.0
26.4
23.4
19.0
ns
402
Clock high period
tSCC/2 10.0
30.0
26.4
23.4
19.0
ns
403
Output data setup to
clock falling edge
(internal clock)
tSCC/4 + 0.5 × TC 17.0
5.5
3.5
1.76
–0.68
ns
404
Output data hold after
clock rising edge (internal
clock)
tSCC/4 1.5 × TC
13
11.5
10
9.04
ns
405
Input data setup time
before clock rising edge
(internal clock)
tSCC/4 + 0.5 × TC + 25.0
47.5
45.5
43.8
41.32
ns
406
Input data not valid
before clock rising edge
(internal clock)
tSCC/4 + 0.5 × TC 5.5
17.0
15.0
13.8
10.81
ns
407
Clock falling edge to
output data valid (external
clock)
32.0
32.0
32.0
32.0
ns
408
Output data hold after
clock rising edge
(external clock)
TC + 8.0
13.0
12.6
12.2
11.64
ns
409
Input data setup time
before clock rising edge
(external clock)
0.0
0.0
0.0
0.0
ns
410
Input data hold time after
clock rising edge
(external clock)
9.0
9.0
9.0
9.0
ns
411
Asynchronous clock cycle
tACC
3
64
× TC
320.0
291.2
266.9
232.0
ns
412
Clock low period
tACC/2 10.0
150.0
135.6
123.5
106.0
ns
413
Clock high period
tACC/2 10.0
150.0
135.6
123.5
106.0
ns
414
Output data setup to
clock rising edge (internal
clock)
tACC/2 30.0
130.0
115.6
103.5
86.0
ns
415
Output data hold after
clock rising edge (internal
clock)
tACC/2 30.0
130.0
115.6
103.5
86.0
ns
Notes:
1.
VCCQH = 3.3 V ± 0.3 V, VCCQL = 1.6 V ± 0.1 V; TJ = –40°C to +100 °C, CL = 50 pF.
2.
tSCC = synchronous clock cycle time (for internal clock, tSCC is determined by the SCI clock control register and TC).
3.
tACC = asynchronous clock cycle time; value given for 1X Clock mode (for internal clock, tACC is determined by the SCI clock
control register and TC).
4.
In the timing diagrams that follow, the SCLK is drawn using the clock falling edge as a the first reference. Clock polarity is
programmable in the SCI Control Register (SCR). Refer to the
DSP56321 Reference Manual for details.
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