HD6432142 datasheet(128/1177 Pages) RENESAS

Il numero della parte	HD6432142

Spiegazioni elettronici	Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2100 Series

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Section 3 MCU Operating Modes

Rev. 4.00 Sep 27, 2006 page 84 of 1130

REJ09B0327-0400

3.1.2

This LSI have a mode control register (MDCR) that indicates the inputs at the mode pins (MD1

and MD0), a system control register (SYSCR) and bus control register (BCR) that control the

operation of the MCU, and a serial/timer control register (STCR) that controls the operation of the

supporting modules. Table 3.2 summarizes these registers.

Table 3.2

MCU Registers

Name

Abbreviation

R/W

Initial Value

Address*

Mode control register

MDCR

R/W

Undetermined

H'FFC5

System control register

SYSCR

R/W

H'09

H'FFC4

Bus control register

BCR

R/W

H'D7

H'FFC6

Serial/timer control register

STCR

R/W

H'00

H'FFC3

Note:

Lower 16 bits of the address.

3.2

3.2.1

Mode Control Register (MDCR)

EXPE

—*

R/W*

—

MDS0

—*

—

MDS1

—*

Note: * Determined by pins MD1 and MD0.

Bit

Initial value

Read/Write

MDCR is an 8-bit read-only register that indicates the operating mode setting and the current

operating mode of the MCU.

The EXPE bit is initialized in coordination with the mode pin states by a reset and in hardware

standby mode.

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