TMP92CF30
2009-06-12
92CF30-146
3.7.21 Port X (PX4, PX5)
Port X5 is 1-bit general-purpose I/O ports. Each bit can be set individually for input or
output. Resetting sets ports X5 to input port and output latch to “0”.
In addition to functioning as general-purpose I/O port, PX5 can also function as the USB
clock input pin (X1USB) and dividing clock output of X1 and X2 oscillation clock (X1D4)
.
Setting in the corresponding bits of PXCR and PXFC enables the respective functions.
Port X4 is 1-bit general-purpose output port. Resetting sets output latch to “0”.
In addition to functioning as general-purpose output port, PX4 can also function as a
system clock output pin (CLKOUT).
Setting in the corresponding bits of PX and PXFC enables the respective functions.
Figure 3.7.56 Port X4
Selector
A
B
S
PX4 (CLKOUT)
Function
control
(on bit basis)
PXFC write
R
Output latch
PX write
CLKOUT output
Internal data b
u
s
Reset
Selector
A
S
PX read
Содержание TLCS-900/H1 Series
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