h8s-2158 Renesas Electronics Corporation., h8s-2158 Datasheet - Page 108

• Manufacturer Part Number: h8s-2158
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 3 MCU Operating Modes
3.2.1
MDCR is used to set an operating mode and to monitor the current operating mode.
Note:
Rev. 3.00 Jan 25, 2006 page 56 of 872
REJ09B0286-0300
Bit
7
6
to
3
2
1
0
Bit Name
EXPE
—
MDS2
MDS1
MDS0
* The initial values are determined by the settings of the MD2, MD1, and MD0 pins.
Mode Control Register (MDCR)
Initial Value
0
All 0
—*
—*
—*
R/W
R/W
R
R
R
R
Description
Extended Mode Enable
Specifies extended mode.
0: Single-chip mode
1: Extended mode
Reserved
Mode Select 2 to 0
These bits indicate the input levels at mode pins (MD2,
MD1, and MD0) (the current operating mode). Bits
MDS2, MDS1, and MDS0 correspond to MD2, MD1,
and MD0, respectively. MDS2 to MDS0 are read-only
bits and they cannot be written to. The mode pin (MD2,
MD1, and MD0) input levels are latched into these bits
when MDCR is read. These latches are canceled by a
reset.