CHAPTER 4 PORT FUNCTIONS
User’s Manual U18698EJ1V0UD
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Figure 4-12. Block Diagram of P121 and P122
P122/X2/EXCLK/OCD0B
RD
EXCLK, OSCSEL
OSCCTL
OSCSEL
OSCCTL
P121/X1/OCD0A
RD
Internal bus
OSCCTL: Clock operation mode select register
RD: Read signal
