UPD78F0838 Renesas Electronics Corporation., UPD78F0838 Datasheet - Page 153

• Manufacturer Part Number: UPD78F0838
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

P12:
PU12:
PM12:
OSCCTL: Clock operation mode select register
RD:
WR
WR
WR
WR
WR
RD
RD
PORT
PORT
PM
PM
:
Port mode register 12
Read signal
Write signal
Port register 12
Pull-up resistor option register 12
PM121, PM123
PM122, PM124
(P121, P123)
(P122, P124)
Output latch
Output latch
OSCSELS
OSCSELS
OSCSEL,
OSCSEL,
OSCCTL
OSCCTL
PM12
PM12
P12
P12
Figure 4-24. Block Diagram of P121 to P124
Preliminary User’s Manual U19748EJ1V0UD
CHAPTER 4 PORT FUNCTIONS
OSCSELS
OSCSEL,
OSCCTL
EXCLKS, OSCSELS
EXCLK, OSCSEL,
OSCCTL
P121/X1/OCD0A,
P123/XT1
P122/X2/EXCLK/OCD0B,
P124/XT2/EXCLKS
151