Datasheet

CHAPTER 4 PORT FUNCTIONS
User’s Manual U18172EJ3V0UD
57
Figure 4-2. Block Diagram of P20 and P21 ( μ PD78F920x)
P20/ANI0/TI000/TOH1,
P21/ANI1/TI010/TO00/INTP0
RD
WR PM
PM20, PM21
PM2
WR PORT
WR PU
PU20, PU21
V DD
P-ch
PU2
PMC2
PMC20, PMC21
A/D converter
Alternate
function
Alternate
function
Selector
Output latch
(P20, P21)
Internal bus
P2
WR PMC
P2: Port register 2
PU2: Pull-up resistor option register 2
PM2: Port mode register 2
PMC2: Port mode control register 2
RD: Read signal
WR××: Write signal