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STR2
Bit
Bit Name Initial Value Slave Host Description
7
DBU27
0
6
DBU26
0
5
DBU25
0
4
DBU24
0
3
C/D2
0
2
DBU22
0
1
IBF2
0
R/W
R/W
R
Defined by User
R/W
R
The user can use these bits as necessary.
R/W
R
R/W
R
R
R
Command/Data
When the host writes to IDR2, bit 2 of the I/O
address (when CH2OFFSEL1 = 0) or bit 0 of the I/O
address (when CH2OFFSEL1 = 1) is written to this
bit to indicate whether IDR2 contains data or a
command.
0: Content of input data register (IDR2) is a data
1: Content of input data register (IDR2) is a
command
R/W
R
Defined by User
The user can use this bit as necessary.
R
R
Input Data Register Full
Indicates whether or not there is receive data in
IDR2.
This bit is an internal interrupt source to the slave
(this LSI).
0: There is not receive data in IDR2
[Clearing condition]
When the slave reads IDR2
1: There is receive data in IDR2
[Setting condition]
When the host writes to IDR2 in an I/O write cycle
Section 19 LPC Interface (LPC)
Rev. 1.00 Mar. 12, 2008 Page 693 of 1178
REJ09B0403-0100
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