HD6432351 datasheet(334/1025 Pages) RENESAS

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Section 8 Data Transfer Controller (DTC)

Rev. 3.00 Sep 15, 2006 page 300 of 988

REJ09B0330-0300

8.2.8

DTC Vector Register (DTVECR)

SWDTE

R/(W)*

DTVEC6

R/W

DTVEC5

R/W

DTVEC4

R/W

DTVEC3

R/W

DTVEC0

R/W

DTVEC2

R/W

DTVEC1

R/W

A value of 1 can always be written to the SWDTE bit, but 0 can only be written after 1

is read.

Bit

Initial value

R/W

Note: *

DTVECR is an 8-bit readable/writable register that enables or disables DTC activation by

software, and sets a vector number for the software activation interrupt.

DTVECR is initialized to H'00 by a reset and in hardware standby mode.

Bit 7—DTC Software Activation Enable (SWDTE): Enables or disables DTC activation by

software.

When clearing the SWDTE bit to 0 by software, write 0 to SWDTE after reading SWDTE set to 1.

Bit 7

SWDTE

Description

DTC software activation is disabled

(Initial value)

[Clearing condition]

When the DISEL bit is 0 and the specified number of transfers have not ended

DTC software activation is enabled

[Holding conditions]

• When the DISEL bit is 1 and data transfer has ended

• When the specified number of transfers have ended

• During data transfer due to software activation

Bits 6 to 0—DTC Software Activation Vectors 6 to 0 (DTVEC6 to DTVEC0): These bits

specify a vector number for DTC software activation.

The vector address is expressed as H'0400 + ((vector number) << 1). <<1 indicates a one-bit left-

shift. For example, when DTVEC6 to DTVEC0 = H'10, the vector address is H'0420.

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