CHAPTER 4 PORT FUNCTIONS
User’s Manual U16898EJ3V0UD
57
Figure 4-9. Block Diagram of P43
P43/TxD6/INTP1
WR
PU
RD
WR
PORT
WR
PM
PU43
Output latch
(P43)
PM43
Alternate
function
V
DD
P-ch
PU4
PM4
Internal bus
Selector
Alternate
function
P4
P4:
Port register 4
PU4:
Pull-up resistor option register 4
PM4: Port mode register 4
RD:
Read signal
WR
××
: Write signal