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CHAPTER 4 PORT FUNCTIONS
User’s Manual U19780EJ2V0UD
88
Figure 4-4. Block Diagram of P11 (1/2)
(1) 78K0/KB2-A
WR
PU
RD
WR
PORT
WR
PM
PU11
PM11
V
DD
P-ch
PM1
PU1
P1
P11/RxD6/TI50/TO50
Internal bus
Output latch
(P11)
Alternate
function
Alternate
function
Selector
P1:
Port register 1
PU1:
Pull-up resistor option register 1
PM1:
Port mode register 1
RD: Read
signal
WR
××
: Write
signal