TMP91C824
91C824-73
2008-02-20
(2)
Port C1, C4 (RXD0, RXD1)
Port C1 and C4 are I/O port pins and can also is used as RXD input for the serial
channels. In case of use RXD0/RXD1, it is possible to logical invert by setting the
register PC<PC1, 4>.
And input data of SIO0 can be select from RXD0/PC1 pin or OPTRX0/P70 by
setting the register PCFC2<P70F2>.
Figure 3.5.20 Port C1 and C4
(3)
Port C2 (
CTS0
, SCLK0), C5 (
CTS1
, SCLK1)
Port C2 and C4 are I/O port pins and can also is used as
CTS
input or SCLK
input/output for the serial channels. In case of use
CTS
, SCLK, it is possible to logical
invert by setting the register PC<PC2, 5>.
Figure 3.5.21 Port C2 and C5
RXD0PC1,
RXD1
Selector
A
B
S
PC read
PC1 (RXD0)
PC4 (RXD1)
Ditection control
(on bit basis)
PCCR write
Reset
S
Output latch
Int
e
rnal da
ta
bus
PC write
Logical invert
Selector
A
B
S
Selector
A
B
S
PC2 (SCLK0,
CTS0
)
PC5 (SCLK1,
CTS1
)
SCLK0,
SCLK1 output
PC read
Ditection control
(on bit basis)
PCCR write
Function control
(on bit basis)
PCFC write
S
Output latch
PC write
Reset
CTS0 ,
CTS1
SCLK0, SCLK1 input
Int
ern
al dat
a
bu
s
Logical
invert
Logical invert