h8s-2161b Renesas Electronics Corporation., h8s-2161b Datasheet - Page 118

• Manufacturer Part Number: h8s-2161b
• 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.
Bit
7
6
to
2
1
0
Note:
Rev. 3.00 Mar 21, 2006 page 64 of 788
REJ09B0300-0300
Bit Name
EXPE
—
MDS1
MDS0
* The initial values are determined by the settings of the MD1 and MD0 pins.
Mode Control Register (MDCR)
Initial Value
—*
All 0
—*
—*
R/W
R/W *
R
R
R
Description
Extended Mode Enable
Specifies extended mode. Fixed to 1 and cannot be
modified in mode 1. Readable/writable and the initial
value is 0 in mode 2 or 3.
0: Single-chip mode
1: Extended mode
Reserved
These bits are always read as 0. These bits cannot be
modified.
Mode Select 1 and 0
These bits indicate the input levels at mode pins (MD1
and MD0) (the current operating mode). Bits MDS1
and MDS0 correspond to MD1 and MD0, respectively.
These bits are read-only bits and they cannot be
written to. The mode pin (MD1 and MD0) input levels
are latched into these bits when MDCR is read. These
latches are canceled by a reset.