CHAPTER 5 PORT FUNCTIONS
Preliminary User’s Manual U17260EJ3V1UD
111
Figure 5-11. Block Diagram of P13
P13/TxD6
WR
PU
RD
WR
PORT
WR
PM
PU13
Output latch
(P13)
PM13
Alternate
function
EV
DD
P-ch
Internal bus
Selector
PU1
PM1
P1
P1:
Port register 1
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
RD: Read
signal
WR
××
: Write
signal