h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 618

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 18A Host Interface X-Bus Interface (XBS)
HICR2 Bit 0—Reserved: Do not set to 1.
18A.2.4 Input Data Register (IDR)
IDRn (n = 1 to 4) is an 8-bit read-only register to the slave processor, and an 8-bit write-only
register to the host processor. When CSn (n = 1 to 4) is low, information on the host data bus is
written into IDRn at the rising edge of IOW. The HA0 state is also latched into the C/D bit in
STRn to indicate whether the written information is a command or data.
The initial values of IDR after a reset and in standby mode are undetermined.
18A.2.5 Output Data Register (ODR)
ODRn (n = 1 to 4) is an 8-bit readable/writable register to the slave processor, and an 8-bit read-
only register to the host processor. The ODRn contents are output on the host data bus when HA0
is low, CSn (n = 1 to 4) is low, and IOR is low.
The initial values of ODR after a reset and in standby mode are undetermined.
Rev. 3.00 Jan 18, 2006 page 590 of 1044
REJ09B0280-0300
Bit
Initial value
Slave Read/Write
Host Read/Write
Bit
Initial value
Slave Read/Write
Host Read/Write
ODR7
IDR7
R/W
—
W
—
R
R
7
7
ODR6
IDR6
R/W
—
—
W
R
R
6
6
ODR5
IDR5
R/W
—
W
—
R
R
5
5
ODR4
IDR4
R/W
—
—
W
R
R
4
4
ODR3
IDR3
R/W
—
W
—
R
R
3
3
ODR2
IDR2
R/W
—
W
—
R
R
2
2
ODR1
IDR1
R/W
—
W
—
R
R
1
1
ODR0
IDR0
R/W
—
—
W
R
R
0
0