TMP92CF30
2009-06-12
92CF30-104
3.7.7
Port 9 (P90 to P92, P96, P97)
P90 to P92 are 3-bit general-purpose I/O port. I/O can be set on a bit basis using the
control register. Each bit can be set individually for input or output. Resetting sets P90 to
P92 to input port and all bits of output latch to”1”.
P96 to P97 are 2-bit general-purpose input port.
Writing “1” the corresponding bits of P9FC enables the respective functions.
Resetting resets the P9FC to “0”, and sets all bits to input ports.
(1)
Port 90 (TXD0), Port 91 (RXD0), Port 92 (SCLK0,
0
CTS
)
Ports 90 to 92 are general-purpose I/O port. They are also function as either SIO0 or
SIO1. SIO0 and SIO1 functions are also used as PP3 to PP5 pins. When selecting SIO0
function (using Port 9 or Port P), set P9FC2<P93F2, P94F2, P95F2>. And when
selection SIO1 function (using Port 9 or Port P), set PPFC2<PP4F2, PP5F2, PP6F2>.
SIO
mode
(SIO0 module)
UART, IrDA mode
(SIO0 module)
P90
TXD0, TXD1
(Data output)
TXD0
(Data output)
P91
RXD0, RXD1
(Data input)
RXD0
(Data input)
P92
SCLK0, SCLK1
(Clock input or output)
0
CTS
,
1
CTS
(Clear to send)
Figure 3.7.14 P90
Internal data b
u
s
Selector
A
B
S
Selector
A
B
S
P90 (TXD0, TXD1)
P9 read
Direction
control
(on bit basis)
P9CR write
Function
control
(on bit basis)
S
Output latch
P9 write
Reset
P9FCwrite
Open-drain
possible
P9FC2<P90F2>
TXD0
output
TXD1output
Selector
S
A
B
P9FC2<P93F2>
Содержание TLCS-900/H1 Series
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