Rev. 1.0, 02/00, page 1031 of 1141
H'D0E5: DDC Switch Register DDCSWR: I
2
C Bus Interface
0
1
1
1
W
*
2
2
1
W
*
2
3
1
4
0
R/(W)
*
1
0
R/W
5
7
IF
CLR3
CLR2
CLR1
CLR0
0
R/W
SWE
6
0
R/W
SW
W
*
2
W
*
2
IE
DDC mode switch interrupt enable bit
0
Disables an interrupt at automatic format switching (Initial value)
1
Enables an interrupt at automatic format switching
DDC mode switch
0
I
2
C bus format is selected for IIC channel 0. (Initial value)
[Clearing condition]
(1) When 0 is written by software
(2) When an SCL falling edge is detected when SWE = 1
1
Formatless transfer is selected for IIC channel 0.
[Setting condition]
When 1 is written after SW = 0 is read
DDC mode switch enable
0
Disables automatic switching from formatless transfer to I
2
C bus
format transfer for IIC channel 0.
(Initial value)
1
Enables automatic switching from formatless transfer to I
2
C bus
format transfer for IIC channel 0.
DDC mode switch interrupt flag
0
Interrupt has not been requested
(Initial value)
[Clearing condition]
When 0 is written after IF = 1 is read
1
Interrupt has been requested
[Setting condition]
When an SCL falling edge is detected when SWE = 1
:
:
:
Bit
Initial value
R/W
Notes: 1. Only 0 can be written to clear the flag.
2. Always read as 1.
I
2
C clear control