Datasheet

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family
DS60001320B-page 188 Preliminary  2015 Microchip Technology Inc.
REGISTER 10-7: DCHxCON: DMA CHANNEL x CONTROL REGISTER
Bit
Range
Bit
31/23/15/7
Bit
30/22/14/6
Bit
29/21/13/5
Bit
28/20/12/4
Bit
27/19/11/3
Bit
26/18/10/2
Bit
25/17/9/1
Bit
24/16/8/0
31:24
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
CHPIGN<7:0>
23:16
U-0 U-0 U-0 U-0 U-0 U-0 U-0 U-0
— — — — — — — —
15:8
R/W-0 U-0 R/W-0 U-0 R/W-0 U-0 U-0 R/W-0
CHBUSY —CHIPGNEN— CHPATLEN — — CHCHNS
(1)
7:0
R/W-0 R/W-0 R/W-0 R/W-0 U-0 R-0 R/W-0 R/W-0
CHEN
(2)
CHAED CHCHN CHAEN — CHEDET CHPRI<1:0>
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 31-24 CHPIGN<7:0>: Channel Register Data bits
Pattern Terminate mode:
Any byte matching these bits during a pattern match may be ignored during the pattern match determina-
tion when the CHPIGNEN bit is set. If a byte is read that is identical to this data byte, the pattern match
logic will treat it as a “don’t care” when the pattern matching logic is enabled and the CHPIGEN bit is set.
bit 23-16 Unimplemented: Read as ‘0’
bit 15 CHBUSY: Channel Busy bit
1 = Channel is active or has been enabled
0 = Channel is inactive or has been disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 CHPIGNEN: Enable Pattern Ignore Byte bit
1 = Treat any byte that matches the CHPIGN<7:0> bits as a “don’t care” when pattern matching is enabled
0 = Disable this feature
bit 12 Unimplemented: Read as ‘0’
bit 11 CHPATLEN: Pattern Length bit
1 = 2 byte length
0 = 1 byte length
bit 10-9 Unimplemented: Read as ‘0’
bit 8 CHCHNS: Chain Channel Selection bit
(1)
1 = Chain to channel lower in natural priority (CH1 will be enabled by CH2 transfer complete)
0 = Chain to channel higher in natural priority (CH1 will be enabled by CH0 transfer complete)
bit 7 CHEN: Channel Enable bit
(2)
1 = Channel is enabled
0 = Channel is disabled
bit 6 CHAED: Channel Allow Events If Disabled bit
1 = Channel start/abort events will be registered, even if the channel is disabled
0 = Channel start/abort events will be ignored if the channel is disabled
bit 5 CHCHN: Channel Chain Enable bit
1 = Allow channel to be chained
0 = Do not allow channel to be chained
Note 1: The chain selection bit takes effect when chaining is enabled (i.e., CHCHN = 1).
2: When the channel is suspended by clearing this bit, the user application should poll the CHBUSY bit (if
available on the device variant) to see when the channel is suspended, as it may take some clock cycles
to complete a current transaction before the channel is suspended.