TDGL003 Microchip Technology, TDGL003 Datasheet - Page 97

• Manufacturer Part Number: TDGL003
• Description: ChipKIT Max32 Development Board PIC32 Boards And Kits
• Manufacturer: Microchip Technology
• Series: PIC® 32MXr
• Type: MCUr

Specifications of TDGL003

• Silicon Manufacturer: Microchip
• Core Architecture: MIPS
• Core Sub-architecture: PIC32
• Silicon Core Number: PIC32MX
• Silicon Family Name: PIC32MX795Fxxxx
• Kit Contents: Board Only
• Contents: Board
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: MPLAB®, Arduino™ Mega

10.0
The PIC32MX Direct Memory Access (DMA) controller
is a bus master module useful for data transfers
between different devices without CPU intervention.
The source and destination of a DMA transfer can be
any of the memory mapped modules existent in the
PIC32MX (such as Peripheral Bus (PBUS) devices:
SPI, UART, PMP, and so on) or memory itself.
Following are some of the key features of the DMA
controller module:
• Four Identical Channels, each featuring:
FIGURE 10-1:
© 2011 Microchip Technology Inc.
- Auto-Increment Source and Destination
- Source and Destination Pointers
- Memory to Memory and Memory to
INT Controller
Note 1: This data sheet summarizes the features
Peripheral Bus
Address Registers
Peripheral Transfers
2: Some registers and associated bits
DIRECT MEMORY ACCESS
(DMA) CONTROLLER
of the PIC32MX3XX/4XX family of
devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 31. “Direct
Memory Access (DMA) Controller”
(DS61117)
Reference Manual”, which is available
from
(www.microchip.com/PIC32).
described in this section may not be
available on all devices. Refer to
Section 4.0 “Memory Organization”
this data sheet for device-specific register
and bit information.
the
Global Control
(DMACON)
DMA BLOCK DIAGRAM
Address
Decoder
of
Microchip
System IRQ
the
“PIC32
web
Family
Channel 0
Channel 1
Channel n
site
Control
Control
Control
in
• Automatic Word-Size Detection:
• Fixed Priority Channel Arbitration
• Flexible DMA Channel Operating Modes:
• Flexible DMA Requests:
• Multiple DMA Channel Status Interrupts:
• DMA Debug Support Features:
• CRC Generation Module:
Channel Priority
- Transfer Granularity, down to byte level
- Bytes need not be word-aligned at source
- Manual (software) or automatic (interrupt)
- One-Shot or Auto-Repeat Block Transfer
- Channel-to-channel chaining
- A DMA request can be selected from any of
- Each channel can select any (appropriate)
- A DMA transfer abort can be selected from
- Pattern (data) match transfer termination
- DMA channel block transfer complete
- Source empty or half empty
- Destination full or half-full
- DMA transfer aborted due to an external
- Invalid DMA address generated
- Most recent address accessed by a DMA
- Most recent DMA channel to transfer data
- CRC module can be assigned to any of the
- CRC module is highly configurable
Arbitration
I
I
I
I
and destination
DMA requests
modes
the peripheral interrupt sources
observable interrupt as its DMA request
source
any of the peripheral interrupt sources
event
channel
available channels
0
1
2
n
PIC32MX3XX/4XX
Y
Interface
Bus
Device Bus + Bus Arbitration
DS61143H-page 97