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MEC1322 датащи(PDF) 259 Page - Microchip Technology

номер детали MEC1322
подробное описание детали  Keyboard and Embedded Controller for Notebook PC
PDF  456 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MEC1322 датащи(HTML) 259 Page - Microchip Technology

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 2014 - 2015 Microchip Technology Inc.
DS00001719D-page 259
MEC1322
21.4
Interface
This block is designed to be accessed externally via the pin interface and internally via a registered host interface.
21.4.1
SIGNAL DESCRIPTION
This block doesn’t have any external signals that may be routed to the pin interface. This DMA Controller is intended to
be used internally to transfer large amounts of data without the embedded controller being actively involved in the trans-
fer.
21.4.2
HOST INTERFACE
The registers defined for the Internal DMA Controller are accessible by the various hosts as indicated in Section 21.9,
"EC-Only Registers".
21.4.3
DMA INTERFACE
Each DMA Master Device that may engage in a DMA transfer must have a compliant DMA interface. The following table
lists the DMA Devices in the MEC1322.
Note 21-1
The Device Number is programmed into field HARDWARE_FLOW_CONTROL_DEVICE of the DMA
Channel N Control register.
FIGURE 21-1:
INTERNAL DMA CONTROLLER I/O DIAGRAM
TABLE 21-2:
DMA CONTROLLER DEVICE SELECTION
Device Name
Device Number
(
Note 21-1)
Controller Source
SMBus 0 Controller
0
Slave
1Master
SMBus 1 Controller
2
Slave
3Master
SMBus 2 Controller
4
Slave
5Master
SMBus 3 Controller
6
Slave
7Master
SPI 0 Controller
8
Transmit
9Receive
SPI 1 Controller
10
Transmit
11
Receive
Internal DMA Controller
Power, Clocks and Reset
Interrupts
DMA Interface
Host Interface



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