451
17.4 Registers of the Bridge Circuit
Note:
Switching of the connection destination by this register is valid only when the resource
function of the connection destination has been allowed. Be careful not to duplicate the port
specification for switching the connection destination between this register and the BRSR3
register.
Table 17.4-2 Bridge Circuit Selection Register 2 (BRSR2) Bit Functions
Bit name
Function
Bit 7
Bit 6
Unused bits
The read value is undefined.
Writing has no effect on operation.
Bit 5
BM4:
Bridge circuit multi-I
2
C
selection 4
This bit specifies options for P42/SCL4/UCK2 and P43/
SDA4/UI2 whether they are connected to the "multi-address
I
2
C."
When "1" is written in this bit, P42/SCL4 and P43/SDA4 are
connected to the "multi-address I
2
C."
When this bit is "0" or BM4=BI4=1, the port function is
selected.
Bit 4
BI4:
Bridge circuit I
2
C selection 4
This bit specifies options for P42/SCL4/UCK2 and P43/
SDA4/UI2 whether they are connected to the "I
2
C."
When "1" is written in this bit, P42/SCL4 and P43/SDA4 are
connected to the "I
2
C."
When this bit is "0" or BM4=BI4=1, the port function is
selected.
Bit 3
BM3:
Bridge circuit multi-I
2
C
selection 3
This bit specifies options for P40/SCL3/UCK1 and P41/
SDA3/UI1 whether they are connected to the "multi-address
I
2
C."
When "1" is written in this bit, P40/SCL3 and P41/SDA3 are
connected to the "multi-address I
2
C."
When this bit is "0" or BM3=BI3=1, the port function is
selected.
Bit 2
BI3:
Bridge circuit I
2
C selection 3
This bit specifies options for P40/SCL3/UCK1 and P41/
SDA3/UI1 whether they are connected to the "I
2
C."
When "1" is written in this bit, P40/SCL3 and P41/SDA3 are
connected to the "I
2
C."
When this bit is "0" or BM3=BI3=1, the port function is
selected.
Bit 1
BM2:
Bridge circuit multi-I
2
C
selection 2
This bit specifies options for P33/SCL2/UCK3 and P34/
SDA2/UI3 whether they are connected to the "multi-address
I
2
C."
When "1" is written in this bit, P33/SCL2 and P34/SDA2 are
connected to the "multi-address I
2
C."
When this bit is "0" or BM2=BI2=1, the port function is
selected.
Bit 0
BI2:
Bridge circuit I
2
C selection 2
This bit specifies options for P33/SCL2/UCK3 and P34/
SDA2/UI3 whether they are connected to the "I
2
C."
When "1" is written in this bit, P33/SCL2 and P34/SDA2 are
connected to the "I
2
C."
When this bit is "0" or BM2=BI2=1, the port function is
selected.