Quad Serial Peripheral Interface (QuadSPI)
MPC5606S Microcontroller Reference Manual, Rev. 7
1030
Freescale Semiconductor
30.4.4.1
AHB bus access considerations
It has to be noted that all logic in the QuadSPI module implementing the AHB Bus access is related to read
the content of an external serial flash device. Therefore the following restrictions apply to the QuadSPI
module with respect to accesses to the AHB bus:
•
In the SPI modes all accesses to the AHB interface are served without errors and undefined values
are returned on read.
•
Any write access in SFM mode is answered with the ERROR condition according to the AMBA
AHB Specification. No write occurs.
•
AHB Bus access types fully supported are NONSEQ and BUSY. In fact access type BUSY is
treated in the same way like NONSEQ.
•
AHB access type SEQ is treated in the same way like NONSEQ. Refer to the AMBA AHB
Specification for further details.
30.4.4.2
Memory-mapped serial flash data (QSPI_SFD)
Starting with address QSPI_AMBA_BASE the content of the external serial flash is mapped into the
address space of the device containing the QuadSPI module. Serial flash address byte address 0x0
corresponds to bus address QSPI_AMBA_BASE with increasing order. Refer to
below for
details.
The available address range depends from the size of the external serial flash device. Any access beyond
the size of the external serial flash provides undefined results.
Note that for serial flash devices of 128MB size the last 4 bytes are not accessible via the memory-mapped
interface.
For details concerning the read process refer to
.
30.4.4.3
AHB RX Data Buffer (QSPI_ARDB)
The AHB RX Data Buffer register is used to read the buffer content of the RX Buffer. Any read access is
redirected to the RX Buffer register entry corresponding to the current value of the read pointer. The
increment of the read pointer depends from the access scheme (DMA or flag-driven). Refer to
Section 30.5.3.3.2, Host Read of the QuadSPI Module Internal Buffers
, topic
RX Buffer, data read via
register interface
and
AHB read
for the description of successive accesses to the RX Buffer content.
Section 30.5.3.4, Byte Ordering of Serial Flash Data
, for the byte ordering scheme.
Table 30-35. Memory-mapped serial flash address scheme
Memory-mapped address
1
1
Access scheme is limited to 32 bit data width
Serial flash byte address
QSPI_AMB0x000_0000
0x000_0000
0x000_0001
0x000_0002
0x000_0003
QSPI_AMB 0x000_0004
0x000_0004
0x000_0005
0x000_0006
0x000_0007
...
...
...
...
...
QSPI_AMB 0x7FF_FFF8
0x7FF_FFF8
0x7FF_FFF9
0x7FF_FFFA
07FF_FFFB
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...
Страница 166: ...Analog to Digital Converter ADC MPC5606S Microcontroller Reference Manual Rev 7 164 Freescale Semiconductor...
Страница 182: ...Boot Assist Module BAM MPC5606S Microcontroller Reference Manual Rev 7 180 Freescale Semiconductor...
Страница 234: ...Clock Description MPC5606S Microcontroller Reference Manual Rev 7 232 Freescale Semiconductor...
Страница 286: ...Crossbar Switch XBAR MPC5606S Microcontroller Reference Manual Rev 7 284 Freescale Semiconductor...
Страница 470: ...e200z0h Core MPC5606S Microcontroller Reference Manual Rev 7 468 Freescale Semiconductor...
Страница 524: ...Enhanced Direct Memory Access eDMA MPC5606S Microcontroller Reference Manual Rev 7 522 Freescale Semiconductor...
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...
Страница 670: ...Flash Memory MPC5606S Microcontroller Reference Manual Rev 7 668 Freescale Semiconductor...
Страница 716: ...FlexCAN MPC5606S Microcontroller Reference Manual Rev 7 714 Freescale Semiconductor...
Страница 882: ...LIN Controller LINFlex MPC5606S Microcontroller Reference Manual Rev 7 880 Freescale Semiconductor...
Страница 901: ...Memory Protection Unit MPU MPC5606S Microcontroller Reference Manual Rev 7 Freescale Semiconductor 899...
Страница 902: ...Memory Protection Unit MPU MPC5606S Microcontroller Reference Manual Rev 7 900 Freescale Semiconductor...
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...
Страница 1096: ...Reset Generation Module MC_RGM MPC5606S Microcontroller Reference Manual Rev 7 1094 Freescale Semiconductor...
Страница 1106: ...Real Time Clock RTC API MPC5606S Microcontroller Reference Manual Rev 7 1104 Freescale Semiconductor...
Страница 1186: ...Stepper Stall Detect SSD MPC5606S Microcontroller Reference Manual Rev 7 1184 Freescale Semiconductor...
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...
Страница 1238: ...Voltage Regulators and Power Supplies MPC5606S Microcontroller Reference Manual Rev 7 1236 Freescale Semiconductor...
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...
Страница 1324: ...Register Map MPC5606S Microcontroller Reference Manual Rev 7 1322 Freescale Semiconductor...