Filter
Top Products
TMP92CZ26A
92CZ26A-166
3.7.20 Port U (PU0 to PU7)
Port U0 to U7 are 8-bit general-purpose I/O ports. Each bit can be set individually for
input or output. Resetting sets port U0 to U7 to input port and output latch to “0”. In
addition to functioning as general-purpose I/O port pins, PU0 to PU7 can also function as
data bus pin for LCD controller (LD16 to LD23) and SDCLK input function.
Above setting is used the control register PUCR and function register PUFC.
In addition to functioning as above function, PU7 can also function as communication for
debug mode (EO_TRGOUT). These functions are operated when it is started in debug
mode. In this case, PU7 can not be used as LD23 function.
Figure 3.7.54 Port U0 to U4 , U6 , U7
Selector
A
B
S
Selector
A
B
S
PU read
Direction
control
(on bit basis)
PUCR write
Function
control
(
on bit basis
)
PUFC write
R
Output latch
PU write
Reset
LD16 to LD20, LD22,LD23
Internal data bus
Debug mode
C
EO_TRGOUT
PU0~PU4,PU6
(LD16 to LD20,LD22)
PU7
(LD23,EO_TRGOUT)