Mode Control Register (Mdcr) - Renesas H8S/2158 User Manual

Section 3 MCU Operating Modes
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 — All 0
to
3
2 MDS2 —*
1 MDS1 —*
0 MDS0 —*
* The initial values are determined by the settings of the MD2, MD1, and MD0 pins.
Note:
Rev. 3.00 Jan 25, 2006 page 56 of 872
REJ09B0286-0300
R/W Description
R/W Extended Mode Enable
Specifies extended mode.
0: Single-chip mode
1: Extended mode
R Reserved
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). 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.