NEC 78K0 Series User Manual page 122
8-bit single-chip microcontrollers
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Also See for 78K0 Series:
- User manual (626 pages) ,
- User manual (483 pages) ,
- User manual (47 pages)
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RD
WR
PORT
Output latch
(P122/P124)
WR
PM
PM122/PM124
RD
WR
PORT
Output latch
(P121/P123)
WR
PM
PM121/PM123
OSCSELS
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
µ
Note
PD78F0537D only
122
CHAPTER 5 PORT FUNCTIONS
Figure 5-23. Block Diagram of P121 to P124
OSCCTL
OSCSEL/
OSCSELS
P12
PM12
OSCCTL
OSCSEL/
OSCSELS
EXCLK, OSCSEL/
EXCLKS, OSCSELS
P12
PM12
OSCCTL
OSCSEL/
Preliminary User's Manual U17260EJ3V1UD
OSCCTL
Note
P122/X2/EXCLK/OCD0B
,
P124/XT2/EXCLKS
Note
P121/X1/OCD0A
,
P123/XT1
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