TMPR3916 datasheet(119/225 Pages) TOSHIBA

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Chapter 6 Direct Memory Access Controller (DMAC)

Preliminary

6-6

Channel Control Register (CCR)

Bit

2322

212019

181716

Name

RST

ABT



CEN

RPL



ETE

Bit

Name

Function

Reset

Value

R/W

RST

Performs a software reset on all of the channel registers.

0 = Normal operation

1 = Executes software reset

R/W

ABT

Termination of channel operations regardless of the operating

status.

0 = Normal operation

1 = Termination of current DMA transaction

R/W



Wired to zero.

0R/W

CEN

Sets the channel to operating mode.

0 = Channel is inactive

1 = Start DMA transaction

R/W

RPL

Specifies the polarity of the device request signal.

0 = Negative logic (low level / falling edge)

1 = Positive logic (high level / rising edge)

UART and TXSEI use negative logic.

R/W

18:17



Wired to zero

ETE

Decides if the request signal from a device is provided to the DMAC.

0 = No request signal is provided to the DMAC

1 = Request signal is provided to the DMAC

Without setting this bit to 1, the DMA controller does not start a

transaction.

R/W

Channel Error Register (CER)

Bit

1514

131211

Name

SWA

BER

ACE

CONF

SBE

DBE

BCE

AER

Bit

Name

Function

Reset

Value

R/W

SWA

Software Abort:

If this bit is set to 1, the software has terminated the current DMA

transaction

BER

Bus Error:

If this bit is set to 1, a bus error has occurred on DMA transfer.

ACE

Address or Count Error: (ACE = BCE + AER)

If this bit is set to 1, a byte count error (BCE, bit 9) or an address

boundary error (AER, bit 8) has occurred.

CONF

Configuration Error:

If this bit is set to 1, the software has made invalid settings in the

Operation Definition Register (ODR) or in the Channel Control

SBE

Bus Error on Source Address Access:

If this bit is set to 1, a bus error has occurred during read from a

source.

DBE

Bus Error on Destination Address Access:

If this bit is set to 1, a bus error has occurred during write to a

destination.

TMPR3916 Datasheet(PDF) 119 Page - Toshiba Semiconductor

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