參數(shù)資料
型號: MCF52277CVM166
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 166.67 MHz, RISC PROCESSOR, PBGA196
封裝: 15 X 15 MM, PLASTIC, ROHS COMPLIANT, MAPBGA-196
文件頁數(shù): 30/42頁
文件大?。?/td> 1632K
代理商: MCF52277CVM166
MCF5227x ColdFire Microprocessor Data Sheet, Rev. 4
Preliminary—Subject to Change Without Notice
Electrical Characteristics
Freescale Semiconductor
36
5.14
DMA Timer Timing Specifications
Table 28 lists timer module AC timings.
5.15
DSPI Timing Specifications
The DMA Serial Peripheral Interface (DSPI) provides a synchronous serial bus with both master and slave operations. Many
of the transfer attributes are programmable. Table 29 provides DSPI timing characteristics for classic SPI timing modes. Refer
to the DSPI chapter of the MCF52277 Reference Manual for information on the modified transfer formats used for
communicating with slower peripheral devices.
Table 28. Timer Module AC Timing Specifications
Num
Characteristic
Min
Max
Unit
T1
DT0IN / DT1IN / DT2IN / DT3IN cycle time
3
tCYC
T2
DT0IN / DT1IN / DT2IN / DT3IN pulse width
1
tCYC
Table 29. DSPI Module AC Timing Specifications1
1 Timings shown are for DMCR[MTFE] = 0 (classic SPI) and DCTARn[CPHA] = 0. Data is sampled on the DSPI_SIN pin on
the odd-numbered DSPI_SCK edges and driven on the DSPI_SOUT pin on even-numbered DSPI edges.
Num
Characteristic
Symbol
Min
Max
Unit
Notes
DS1
DSPI_SCK Cycle Time
tSCK
4 x tSYS
—ns
2
2 When in master mode, the baud rate is programmable in DCTARn[PBR] and DCTARn[BR].
DS2
DSPI_SCK Duty Cycle
(tsck
÷ 2) – 2.0 (tsck ÷ 2) + 2.0
ns
Master Mode
DS3
DSPI_PCSn to DSPI_SCK delay
tCSC
(2
× t
SYS) – 2.0
ns
3
3 The DSPI_PCSn to DSPI_SCK delay is programmable in DCTARn[PCSSCK] and DCTARn[CSSCK].
DS4
DSPI_SCK to DSPI_PCSn delay
tASC
(2
× t
SYS) – 3.0
ns
4
4 The DSPI_SCK to DSPI_PCSn delay is programmable in DCTARn[PASC] and DCTARn[ASC].
DS5
DSPI_SCK to DSPI_SOUT valid
5
ns
DS6
DSPI_SCK to DSPI_SOUT invalid
–5
ns
DS7
DSPI_SIN to DSPI_SCK input setup
9
ns
DS8
DSPI_SCK to DSPI_SIN input hold
0
ns
Slave Mode
DS9
DSPI_SCK to DSPI_SOUT valid
4
ns
DS10
DSPI_SCK to DSPI_SOUT invalid
0
ns
DS11
DSPI_SIN to DSPI_SCK input setup
2
ns
DS12
DSPI_SCK to DSPI_SIN input hold
7
ns
DS13
DSPI_SS active to DSPI_SOUT driven
20
ns
DS14
DSPI_SS inactive to DSPI_SOUT not driven
18
ns
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