
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
142
Figure 4-23. Block Diagram of P912 and P915
Internal
bus
WRPMC
RD
Address
SCK2, SCK3 output
A12, A15 output
SCK2, SCK3 input
WRPORT
P912/A12/SCK2,
P915/A15/SCK3
PMC9n
WRPFC
PFC9n
Selector
Output enable signal of
SCK2 and SCK3
Output buffer off signal
Selector
WRPU
PU9n
WRPM
PM9n
Output latch
(P9n)
WRPF
PF9n
PMC9
PFC9
PU9
PM9
P9
PF9
EVDD
P-ch
EVDD
EVSS
P-ch
N-ch
Selector
Caution
These pins do not have hysteresis characteristics in the port mode.
They have hysteresis characteristics only when an input-pin alternate function is used.
Remarks 1. P9:
Port register 9
PM9:
Port mode register 9
PMC9: Port mode control register 9
PFC9: Port function control register 9
PF9:
Port function register 9
PU9:
Pull-up resistor option register 9
Output buffer off signal: Signal that is active in the IDLE/STOP mode or during bus hold
2. n = 12 or 15