HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 766

• Manufacturer Part Number: HD6412320
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 19 ROM
19.1.2
The operating mode of the chip is controlled by the mode pins and the BCRL register. The ROM-
related registers are shown in table 19.1.
Table 19.1 ROM Registers
Register Name
Mode control register
Bus controller register
Note: * Lower 16 bits of the address.
19.2
19.2.1
Note: * Determined by pins MD2 to MD0.
MDCR is an 8-bit read-only register used to monitor the current operating mode of the chip.
Bit 7—Reserved: This bit cannot be modified and is always read as 1.
Bits 6 to 3—Reserved: These bits cannot be modified and are always read as 0.
Bits 2 to 0—Mode Select 2 to 0 (MDS2 to MDS0): These bits indicate the input levels at pins
MD2 to MD0 (the current operating mode). Bits MDS2 to MDS0 correspond to pins MD2 to
MD0. MDS2 to MDS0 are read-only bits, and cannot be modified. The mode pin (MD2 to MD0)
input levels are latched into these bits when MDCR is read. These latches are canceled by a reset.
Rev.6.00 Sep. 27, 2007 Page 736 of 1268
REJ09B0220-0600
Bit
Initial value :
R/W
Register Configuration
Register Descriptions
Mode Control Register (MDCR)
:
:
—
—
7
1
—
—
6
0
Abbreviation
MDCR
BCRL
—
—
5
0
—
—
4
0
R/W
R/W
R/W
—
—
3
0
Initial Value
Undefined
Undefined
MDS2
— *
R
2
MDS1
— *
R
1
H'FF3B
Address *
H'FED5
MDS0
— *
R
0