TMP91C824
91C824-74
2008-02-20
Port C Register
7 6 5 4 3 2 1 0
Bit
symbol
PC5 PC4 PC3 PC2 PC1 PC0
Read/Write
R/W
After reset
Data from external port (Output latch register is set to “1”.)
Port C Control Register
7 6 5 4 3 2 1 0
Bit
symbol
PC5C PC4C PC3C PC2C PC1C PC0C
Read/Write
W
After
reset
0 0 0 0 0 0
Function
0: Input 1: Output
Port C Functon Register
7 6 5 4 3 2 1 0
Bit
symbol
PC5F PC3F
PC2F PC0F
Read/Write
W W
W W
After
reset
0 0 0 0
Function
0:
Port
1:
SCLK1
output
0:
Port
1:
TXD1
0: Port
1:
SCLK0
output
0:
Port
1:
TXD0
Port C ODE Register
7 6 5 4 3 2 1 0
Bit
symbol
ODEPC3
ODEPC0
Read/Write
W
W
After
reset
0 0
Function
TXD1
0: CMOS
1:
Open
drain
TXD0
0: CMOS
1:
Open
drain
Note 1: Read-modify-write is prohibited for the registers PCCR, PCFC and PCODE.
Note 2: PC1/RXD0, PC4/RXD1 pins do not have a register changing PORT/FUNCTION. For
example, when it is used as an input port, the input signal is inputted to SIO as the cereal
receive data.
Figure 3.5.22 Register for Port C
PCFC
(0027H)
PC
(0023H)
PCCR
(0026H)
PCODE
(0028H)