Freescale Semiconductor MPC5200B ユーザーズマニュアル
I
2
C Interface Registers
MPC5200B Users Guide, Rev. 1
Freescale Semiconductor
18-17
18.3.6
I
2
C Interrupt Control Register—MBAR + 0x3D20
The Interrupt Control register is common to both MPC5200B I
2
C modules. Each module generates an internal interrupt that can be routed as
follows:
•
To the CPU interrupt, if IE is set to 1.
•
To the TX requestor at SDMA, if TE is set to 1.
Table 18-8. I
2
C Interrupt Control Register
msb 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R
BNBE2
TE2
RE2
IE2
BNBE1
TE1
RE1
IE1
Reserved
W
RESET:
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31 lsb
R
Reserved
W
RESET:
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
Name
Description
0
BNBE2
Bus Not Busy Enable 2—lets module 2 generate an interrupt when the bus is not busy. BNBE2
indicates an idle condition.
indicates an idle condition.
To clear the interrupt, software must write 0 to the bit position.
Reset condition disables BNBE2.
1
TE2
Transmit Enable 2—routes the interrupt for module 2 to the TX requestor at SDMA.
Clear by writing 0 to this bit position.
Reset condition disables TE2.
2
RE2
Receive Enable 2—routes the interrupt for module 2 to the RX requestor at SDMA.
Clear by writing 0 to this bit position.
Reset condition disables RE2.
3
IE2
Interrupt Enable 2—routes the interrupt for module 2 to the CPU.
Clear by writing 0 to this bit position.
Reset condition enables IE2.
4
BNBE1
Bus Not Busy Enable 1—lets module 1 generate an interrupt when the bus is not busy. BNBE1
indicates an idle condition.
indicates an idle condition.
To clear the interrupt, software must write 0 to the bit position.
Reset condition disables this bit.
5
TE1
Transmit Enable 1—routes the interrupt for module 1 to the TX requestor at SDMA.
Clear by writing 0 to this bit position.
Reset condition disables TE1.
6
RE1
Receive Enable 1—routes the interrupt for module 1 to the RX requestor at SDMA.
Clear by writing a 0 to this bit position.
Reset condition disables RE1.
7
IE1
Interrupt Enable 1—routes the interrupt for module 1 to the CPU.
Clear by writing 0 to this bit position.
Reset condition enables IE1.
8:31
—
Reserved