CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U19014EJ1V0UD
69
Figure 4-9. Block Diagram of P17
P17/TI50/TO50
WR
PU
RD
WR
PORT
WR
PM
PU17
Alternate
function
Output latch
(P17)
PM17
Alternate
function
EV
DD
P-ch
Selector
Internal bus
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
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