TMP91C824
91C824-67
2008-02-20
Port 7 Register
7 6 5 4 3 2 1 0
Bit
symbol
P72
P71
P70
Read/Write
R/W
After
reset
Data from external port
(Output latch register is set to “1”.)
Function
0(Output
latch
register)
: Pull-up resistor ON
1(Output latch register)
: Pull-up resistor OFF
–
Port 7 Control Register
7 6 5 4 3 2 1 0
Bit
symbol
P72C
P71C
P70C
Read/Write
W
After
reset
0
0
0
Function
0: Input 1: Output
Port 7 Function Register
7 6 5 4 3 2 1 0
Bit
symbol
P72F
P71F
P70F
Read/Write
W
After
reset
0
0
0
Function
0: Port
1: SCL
output
0: Port
1: SDA/SO
output
0: Port
1: SCK
output
Port 7 Function Register 2
7 6 5 4 3 2 1 0
Bit
symbol
–
P71F2
P70F2
Read/Write
W
After reset
0
0
0
Function
Always
write 0
0: <P71F>
1: OPTTX0
output
SIO0 RXD
pin select
0: RXD0 (PC1)
1: OPTRX0
(P70)
Port 7 ODE Register
7 6 5 4 3 2 1 0
Bit symbol
ODEP72
ODEP71
Read/Write
W
After
reset
0
0
Function
0:
3
states
1: Open drain
Note: Read-modify-write is prohibited for P7CR, P7FC, P7FC2 and P7ODE.
Figure 3.5.12 Register for Port 7
P7FC
(0017H)
P7
(0013H)
P7CR
(0016H)
P7FC2
(001CH)
P7ODE
(001FH)