Register Descriptions; Mode Control Register (Mdcr) - Renesas H8S Series Hardware Manual

Section 3 MCU Operating Modes
3.2

Register Descriptions

The following registers are related to the operating modes. For details on the bus control register
(BCR), see section 6.2.1, Bus Control Register (BCR).

• Mode control register (MDCR)

• System control register (SYSCR)
• Serial timer control register (STCR)
• System control register 3 (SYSCR3)
3.2.1 Mode Control Register (MDCR)
MDCR is used to set an operating mode and to monitor the current operating mode.
Bit Bit Name Initial Value
7 EXPE 0
6 to 3 — All 0
2 MDS2 —*
1 MDS1 —*
0 MDS0 —*
Note: * The initial values are determined by the settings of the MD2, MD1, and MD0 pins.
Rev. 3.00 Jul. 14, 2005 Page 60 of 986
REJ09B0098-0300
R/W Description
R/W Reserved
The initial value should not be changed.
R Reserved
The initial value should not be changed.
R Mode Select 2 to 0
R
These bits indicate the input levels at mode pins (MD2,
R
MD1, and MD0) (the current operating mode). The
MDS2, MDS1, and MDS0 bits correspond to the MD2,
MD1, and MD0 pins, respectively. These bits are read-
only bits and cannot be written to.
The input levels of the mode pins (MD2, MD1, and MD0)
are latched into these bits when MDCR is read. These
latches are canceled by a reset.