Quad Serial Peripheral Interface (QuadSPI)
MPC5606S Microcontroller Reference Manual, Rev. 7
1068
Freescale Semiconductor
Note also that the serial flash device clock SCK is inverted w.r.t. the
QuadSPI internal reference clock.
Figure 30-37. Serial Flash Sampling Clock Timing
The rising edge of the internal reference clock is taken as timing reference for the data output of the serial
flash. After a time of t
Del,total
the data arrive at the internal sampling stage of the QuadSPI module.
According to
the following parts of the delay chain contribute to t
Del,total
:
1. Output delay of the serial flash clock output of the device containing the QuadSPI module
2. Wire delay of application/PCB from the device containing the QuadSPI module to the external
serial flash device
3. Clock to data out delay of the external serial flash device, including input and output delays
4. Wire delay of application/PCB from the external serial flash device to the device containing the
QuadSPI module
5. Input delay belonging to the data in input
The possible points in time for the sampling of the incoming data are denoted as N/1, I/1, N/2 and I/2
above. The sampling point relevant for the internal sampling is configured in the QSPI_SMPR register,
refer to
Section 30.4.3.13, Sampling Register (QSPI_SMPR)
, for details. Note that the falling edges of the
reference clock are not actually used, instead the inverted clock is used for sampling at these positions.
below gives an overview of the available configurations for the commands running at regular
(full) speed:
internal ref clock
serial flash data
internal reference for serial flash data sampling
t
Del,total
N/1
N/2
I/1
I/2
Possible Sampling Points
SCK—serial flash clock
Содержание MPC5602S
Страница 76: ...Overview MPC5606S Microcontroller Reference Manual Rev 7 74 Freescale Semiconductor...
Страница 82: ...Memory Map MPC5606S Microcontroller Reference Manual Rev 7 80 Freescale Semiconductor...
Страница 112: ...Signal Description MPC5606S Microcontroller Reference Manual Rev 7 110 Freescale Semiconductor...
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Страница 546: ...Error Correction Status Module ECSM MPC5606S Microcontroller Reference Manual Rev 7 544 Freescale Semiconductor...
Страница 669: ...Flash Memory MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 667...
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Страница 901: ...Memory Protection Unit MPU MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 899...
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Страница 955: ...Mode Entry Module MC_ME MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 953...
Страница 956: ...Mode Entry Module MC_ME MPC5606S Microcontroller Reference Manual Rev 7 954 Freescale Semiconductor...
Страница 1072: ...Quad Serial Peripheral Interface QuadSPI MPC5606S Microcontroller Reference Manual Rev 7 1070 Freescale Semiconductor...
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Страница 1213: ...System Integration Unit Lite SIUL MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 1211...
Страница 1214: ...System Integration Unit Lite SIUL MPC5606S Microcontroller Reference Manual Rev 7 1212 Freescale Semiconductor...
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Страница 1252: ...Wakeup Unit WKPU MPC5606S Microcontroller Reference Manual Rev 7 1250 Freescale Semiconductor...
Страница 1258: ...Registers Under Protection MPC5606S Microcontroller Reference Manual Rev 7 1256 Freescale Semiconductor...
Страница 1323: ...Register Map MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 1321...
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