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If e_sg = 0b and the dlast_sga changed, the dynamic link attempt was successful (the
new TCD’s e_sg value cleared the e_sg bit).
22.5.8 Lockstep
This chip contains an eDMA Checker which, when enabled, operates in Lockstep mode
with the primary eDMA, executing the exact same transfer profiles. The eDMA Checker
checks to ensure the primary eDMA is operating correctly. A block diagram is shown
below.
DMA checker
RCCU
Checker Lake
Alarms
de
lay
_e
lem
en
t
de
lay
_e
lem
en
t
de
lay
_e
lem
en
t
de
lay
_e
lem
en
t
DMA
Inputs
DMA
Outputs
DMA
Outputs
Si
gn
al
Co
m
pr
es
sio
n
Si
gn
al
Co
m
pr
es
sio
n
DMA
22.5.8.1 Initialization
To prevent the eDMA Checker from generating a false comparison error after power-on-
reset, the eDMA’s data output buffer must be initialized prior to enabling the Checker. To
initialize the eDMA data output buffer, the eDMA must perform a one or more 32-bit
data transfers using any data value.
Chapter 22 Enhanced Direct Memory Access (eDMA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors
507
Содержание K22F series
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Страница 150: ...Private Peripheral Bus PPB memory map K22F Sub Family Reference Manual Rev 4 08 2016 150 NXP Semiconductors...
Страница 168: ...Module clocks K22F Sub Family Reference Manual Rev 4 08 2016 168 NXP Semiconductors...
Страница 198: ...Security Interactions with other Modules K22F Sub Family Reference Manual Rev 4 08 2016 198 NXP Semiconductors...
Страница 258: ...Functional description K22F Sub Family Reference Manual Rev 4 08 2016 258 NXP Semiconductors...
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Страница 1028: ...Initialization Procedure K22F Sub Family Reference Manual Rev 4 08 2016 1028 NXP Semiconductors...
Страница 1040: ...Example configuration for chained timers K22F Sub Family Reference Manual Rev 4 08 2016 1040 NXP Semiconductors...
Страница 1118: ...Device mode IRC48 operation K22F Sub Family Reference Manual Rev 4 08 2016 1118 NXP Semiconductors...
Страница 1122: ...USB Voltage Regulator Module Signal Descriptions K22F Sub Family Reference Manual Rev 4 08 2016 1122 NXP Semiconductors...
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