參數(shù)資料
型號(hào): MSC8122MP8000
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 數(shù)字信號(hào)處理
英文描述: 32-BIT, 500 MHz, OTHER DSP, PBGA431
封裝: FCBGA-431
文件頁數(shù): 14/48頁
文件大?。?/td> 1158K
代理商: MSC8122MP8000
Electrical Characteristics
MSC8122 Quad Digital Signal Processor Data Sheet, Rev. 16
Freescale Semiconductor
21
2.5.4.3
Reset Timing Tables
Table 12 and Figure 9 describe the reset timing for a reset configuration write through the direct slave interface (DSI) or
through the system bus.
Table 12. Timing for a Reset Configuration Write through the DSI or System Bus
No.
Characteristics
Expression
Min
Max
Unit
1
Required external PORESET duration minimum
CLKIN = 20 MHz
CLKIN = 100 MHz (300 MHz core)
CLKIN = 133 MHz (400 MHz core)
CLKIN = 166 MHz (500 MHz core)
16/CLKIN
800
160
120
96
ns
2
Delay from deassertion of external PORESET to deassertion of internal
PORESET
CLKIN = 20 MHz to 166 MHz
1024/CLKIN
6.17
51.2
s
3
Delay from de-assertion of internal PORESET to SPLL lock
CLKIN = 20 MHz (RDF = 1)
CLKIN = 100 MHz (RDF = 1) (300 MHz core)
CLKIN = 133 MHz (RDF = 2) (400 MHz core)
CLKIN = 166 MHz (RDF = 2) (500 MHz core)
6400/(CLKIN/RDF)
(PLL reference
clock-division factor)
320
64
96
77
320
64
96
77
s
5
Delay from SPLL to HRESET deassertion
REFCLK = 40 MHz to 166 MHz
512/REFCLK
3.08
12.8
s
6
Delay from SPLL lock to SRESET deassertion
REFCLK = 40 MHz to 166 MHz
515/REFCLK
3.10
12.88
s
7
Setup time from assertion of
RSTCONF, CNFGS, DSISYNC, DSI64,
CHIP_ID[0–3], BM[0–2], SWTE, and MODCK[1–2] before deassertion of
PORESET
3—
ns
8
Hold time from deassertion of PORESET to deassertion of
RSTCONF,
CNFGS, DSISYNC, DSI64, CHIP_ID[0–3], BM[0–2], SWTE, and
MODCK[1–2]
5—
ns
Note:
Timings are not tested, but are guaranteed by design.
Figure 9. Timing Diagram for a Reset Configuration Write
PORESET
Internal
HRESET
Input
Output (I/O)
SRESET
Output (I/O)
RSTCONF, CNFGS, DSISYNC, DSI64
CHIP_ID[0–3], BM[0–2], SWTE, MODCK[1–2]
Host programs
Word
SPLL is locked
(no external indication)
PORESET
Reset Configuration
pins are sampled
1
2
MODCK[3–5]
1 + 2
3
5
6
SPLL
locking period
Reset configuration write
sequence during this
period.
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