CHAPTER 5 PORT FUNCTIONS
Preliminary User’s Manual U17260EJ3V1UD
122
Figure 5-23. Block Diagram of P121 to P124
P122/X2/EXCLK/OCD0B
Note
,
P124/XT2/EXCLKS
RD
WR
PORT
WR
PM
Output latch
(P122/P124)
PM122/PM124
PM12
P12
RD
WR
PORT
WR
PM
Output latch
(P121/P123)
PM121/PM123
PM12
P12
EXCLK, OSCSEL/
EXCLKS, OSCSELS
OSCCTL
OSCSEL/
OSCSELS
OSCCTL
P121/X1/OCD0A
Note
,
P123/XT1
OSCSEL/
OSCSELS
OSCCTL
OSCSEL/
OSCSELS
OSCCTL
Internal bus
Selector
Selector
P12:
Port register 12
PU12:
Pull-up resistor option register 12
PM12:
Port mode register 12
OSCCTL: Clock operation mode select register
RD: Read
signal
WR
××
: Write
signal
Note
µ
PD78F0537D only
Содержание 78K/0 Series
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