H8SSLASH2214 datasheet(265/936 Pages) RENESAS

Il numero della parte	H8S/2214

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	936 Pages

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Produttore elettronici	RENESAS [Renesas Technology Corp]

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Section 7 DMA Controller

Rev.4.00 Sep. 18, 2008 Page 205 of 872

REJ09B0189-0400

Bit

DMAWER :

—

WE1B

WE1A

WE0B

WE0A

Initial value :

R/W

—

R/W

DMAWER is an 8-bit readable/writable register that controls enabling or disabling of writes to the

DMACR, DMABCR, and DMATCR by the DTC.

DMAWER is initialized to H'00 by a reset, and in standby mode.

Bits 7 to 4—Reserved: Read-only bits, always read as 0.

Bit 3—Write Enable 1B (WE1B): Enables or disables writes to all bits in DMACR1B, bits 11, 7,

and 3 in DMABCR, and bit 5 in DMATCR by the DTC.

Bit 3

WE1B

Description

Writes to all bits in DMACR1B, bits 11, 7, and 3 in DMABCR, and bit 5 in DMATCR

are disabled

(Initial value)

Writes to all bits in DMACR1B, bits 11, 7, and 3 in DMABCR, and bit 5 in DMATCR

are enabled

Bit 2—Write Enable 1A (WE1A): Enables or disables writes to all bits in DMACR1A, and bits

10, 6, and 2 in DMABCR by the DTC.

Bit 2

WE1A

Description

Writes to all bits in DMACR1A, and bits 10, 6, and 2 in DMABCR are disabled

(Initial value)

Writes to all bits in DMACR1A, and bits 10, 6, and 2 in DMABCR are enabled

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