H8SX1663 datasheet(119/1158 Pages) RENESAS

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Section 3 MCU Operating Modes

Rev.1.00 Jun. 07, 2006 Page 67 of 1102

REJ09B0294-0100

Bit

Bit Name

Initial Value R/W

Descriptions

MDS7

Undefined*

Indicates the value set by mode pin (MD3).

When MDCR is read, the input level on the MD3 pin is

latched. This latching is released by a reset.



Reserved

These are read-only bits and cannot be modified.

MDS3

MDS2

MDS1

MDS0

Undefined*

Mode Select 3 to 0

These bits indicate the operating mode selected by

the mode pins (MD2 to MD0) (see table 3.2).

When MDCR is read, the signal levels input on pins

MD2 to MD0 are latched into these bits. These

latches are released by a reset.



Undefined*

Reserved

These are read-only bits and cannot be modified.

Note:

Determined by pins MD3 to MD0.

Table 3.3

Settings of Bits MDS3 to MDS0

Mode Pins

MDCR

MCU Operating

Mode

MD2

MD1

MD0

MDS3

MDS2

MDS1

MDS0

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