EMC EM78612 User Manual
Page 20
EM78612
Universal Serial Bus Microcontroller
18 •
•••
Product Specification(V1.0) 03.22.2006
(This specification is subject to change without further notice)
IOC5 (Data Line I/O Control Register)
Default Value: (0B_0000_0011)
7
6
5
4
3
2
1
0
0
0
0
0
0
0
P51
P50
IOC5 [2~7] Undefined registers. The default value is 0.
IOC6 (Port 6 I/O Control Register)
Default Value: (0B_1111_1111)
7
6
5
4
3
2
1
0
P67
P66
P65
P64
P63
P62
P61
P60
IOC7 (Port 7 I/O Control Register)
Default Value: (0B_0000_1111)
7
6
5
4
3
2
1
0
-
-
-
-
P73
P72
P71
P70
IOC8 (Sink Current Control Register)
Default Value: (0B_0000_0000)
7
6
5
4
3
2
1
0
0
0
Sink1.1
Sink1.0
0
0
Sink01
Sink0.0
IOC8 [0,1][4,5] are P70/P71 sink current control registers. Four levels are offered for
selection:
Sink0.1/1.1
Sink0.0/1.0
Sink Current
0
0
3mA
±
10%
0
1
6mA
±
10%
1
0
12mA
±
10%
1
1
25mA
±
10%
The default current after Power-on reset is 3mA.
IOCA (Operation Mode Control Register)
Default Value: (0B_1100_0011)
7
6
5
4
3
2
1
0
Dual_Frq.1 Dual_Frq.0
0
0
0
0
PS/2
USB
IOCA [0,1]
These two bits are used to select the operation mode. The definition of
these two control registers is described in the table below.
IOCA[1]
IOCA[0]
Operation Mode
0
0
Detect Mode
0
1
USB Mode