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Deserial Serial Peripheral Interface (DSPI)
MPC5566 Microcontroller Reference Manual, Rev. 2
20-62
Freescale Semiconductor
shows the timing diagram for two four-bit transfers with CPHA = 1 and CONT = 0.
Figure 20-38. Example of Non-continuous Format (CPHA = 1, CONT = 0)
When the CONT = 1 and the PCS signal for the next transfer is the same as for the current transfer, the
PCS signal remains asserted for the duration of the two transfers. The delay between transfers (t
DT
) is not
inserted between the transfers.
shows the timing diagram for two 4-bit transfers with CPHA = 1 and CONT = 1.
Figure 20-39. Example of Continuous Transfer (CPHA = 1, CONT = 1)
, the period length at the start of the next transfer is the sum of t
ASC
and t
CSC
; i.e., it does
not include a half-clock period. The default settings for these provide a total of four system clocks. In many
situations, t
ASC
and t
CSC
must be increased if a full half-clock period is required.
Switching CTARs between frames while using continuous selection can cause errors in the transfer. The
PCS signal must be negated before CTAR is switched.
When the CONT bit = 1 and the PCS signals for the next transfer are different from the present transfer,
the PCS signals behave as if the CONT bit was not set.
SCK
(CPOL = 0)
PCSx
t
ASC
SCK
(CPOL = 1)
Master SOUT
t
DT
t
CSC
t
CSC
= PCS to SCK delay.
t
ASC
= After SCK delay.
t
DT
= Delay after transfer (minimum CS negation time).
Master SIN
t
CSC
SCK
(CPOL = 0)
PCS
t
ASC
SCK
(CPOL = 1)
Master SOUT
t
CSC
t
CSC
t
CSC
= PCS to SCK delay.
t
ASC
= After SCK delay.
Master SIN
Содержание MPC5566
Страница 12: ...MPC5566 Microcontroller Reference Manual Devices Supported MPC5566 MPC5566 RM Rev 2 0 23 Apr 2008...
Страница 81: ...Introduction MPC5566 Microcontroller Reference Manual Rev 2 1 24 Freescale Semiconductor...
Страница 135: ...Signal Description MPC5566 Microcontroller Reference Manual Rev 2 2 54 Freescale Semiconductor...
Страница 189: ...Reset MPC5566 Microcontroller Reference Manual Rev 2 4 20 Freescale Semiconductor...
Страница 331: ...System Integration Unit SIU MPC5566 Microcontroller Reference Manual Rev 2 6 128 Freescale Semiconductor...
Страница 343: ...Crossbar Switch XBAR MPC5566 Microcontroller Reference Manual Rev 2 7 12 Freescale Semiconductor...
Страница 361: ...Error Correction Status Module ECSM MPC5566 Microcontroller Reference Manual Rev 2 8 18 Freescale Semiconductor...
Страница 455: ...Interrupt Controller INTC MPC5566 Microcontroller Reference Manual Rev 2 10 42 Freescale Semiconductor...
Страница 603: ...Flash Memory MPC5566 Microcontroller Reference Manual Rev 2 13 38 Freescale Semiconductor...
Страница 609: ...SRAM MPC5566 Microcontroller Reference Manual Rev 2 14 6 Freescale Semiconductor...
Страница 679: ...Boot Assist Module BAM MPC5566 Microcontroller Reference Manual Rev 2 16 20 Freescale Semiconductor...
Страница 997: ...Deserial Serial Peripheral Interface DSPI MPC5566 Microcontroller Reference Manual Rev 2 20 72 Freescale Semiconductor...
Страница 1037: ...Enhanced Serial Communication Interface eSCI MPC5566 Microcontroller Reference Manual Rev 2 21 40 Freescale Semiconductor...
Страница 1073: ...MPC5566 Microcontroller Reference Manual Rev 2 22 36 Freescale Semiconductor...
Страница 1081: ...Voltage Regulator Controller VRC and POR Module MPC5566 Microcontroller Reference Manual Rev 2 23 8 Freescale Semiconductor...
Страница 1093: ...IEEE 1149 1 Test Access Port Controller JTAGC MPC5566 Microcontroller Reference Manual Rev 2 24 12 Freescale Semiconductor...
Страница 1185: ...Nexus MPC5566 Microcontroller Reference Manual Rev 2 25 92 Freescale Semiconductor...
Страница 1267: ...MPC5566 Reference Manual Revision History MPC5566 Microcontroller Reference Manual Rev 2 Freescale Semiconductor C 10...
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