Register Descriptions; Mode Control Register (Mdcr) - Renesas H8S/2100 Series Hardware Manual

Section 3 MCU Operating Modes
3.2

Register Descriptions

The following registers are related to the operating modes.
Table 3.2 Register Configuration
Register Name
Mode control register
System control register
Serial timer control register
System control register 3
3.2.1

Mode Control Register (MDCR)

MDCR is used to set an operating mode and to monitor the current operating mode.
Initial
Bit Bit Name Value
7 EXPE 0
6 to 3 — All 0
2 MDS2 —*
1 MDS1 —*
0 — 0
Note: * The initial values are determined by the settings of the MD2 and MD1 pins.
Rev. 1.00 May 09, 2008 Page 66 of 954
REJ09B0462-0100
Abbreviation R/W
MDCR R/W
SYSCR R/W
STCR R/W
SYSCR3 R/W
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 and 1
R These bits indicate the input levels at mode pins (MD2
and MD1) (the current operating mode). The MDS2 and
MDS1 bits correspond to the MD2 and MD1 pins,
respectively. These bits are read-only bits and cannot
be written to.
The input levels of the mode pins (MD2 and MD1) are
latched into these bits when MDCR is read. These
latches are canceled by a reset.
R Reserved
The initial value should not be changed.
Initial Value Address

H'FFC5
H'09 H'FFC4
H'00 H'FFC3
H'60 H'FE7D
Data Bus
Width
8
8
8
8