H8SXSLASH1663R datasheet(113/1504 Pages) RENESAS

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Section 3 MCU Operating Modes

Rev. 2.00 Sep. 24, 2008 Page 81 of 1468

REJ09B0412-0200

3.2

The following registers are related to the operating mode setting.

• Mode control register (MDCR)

• System control register (SYSCR)

3.2.1

Mode Control Register (MDCR)

MDCR indicates the current operating mode. When MDCR is read from, the states of signals

MD3 to MD0 are latched. Latching is released by a reset.

Bit

Bit Name

Initial Value

R/W

Note: * Determined by pins MD3 to MD0.

MDS7

Undefined*



MDS3

Undefined*

MDS2

Undefined*

MDS1

Undefined*

MDS0

Undefined*

Bit

Bit Name

Initial Value

R/W



Undefined*



Undefined*



Undefined*



Undefined*



Undefined*

Bit

Bit Name

Initial Value R/W

Descriptions

MDS7

Undefined*

This pin indicates a value set with the mode pin

(MD3)

When MDCR is read, the signal levels input on the

MD3 pin is latched into this bit. This latch is released

by a reset.



Reserved

These are read-only bits and cannot be modified.

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