
CHAPTER 4 PORT FUNCTIONS
User’s Manual U15905EJ2V1UD
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(d) Port function control register 9 (PFC9)
This 16-bit register specifies control mode 1 or control mode 2.
It can be read or written only in 16-bit units.
If the higher 8 bits of the PFC9 register are used as PFC9H and the lower 8 bits as PFC9L, however,
PFC9H and PFC9L can be manipulated in 8-bit or 1-bit units.
Caution
To perform separate bus address output (A0 to A15), set the PFC9 register to 0000H, and
then set the PMC9 register to FFFFH in 16-bit units.
(1/2)
PFC9 (PFC9HNote)
(PFC9L)
A15 output (with separate bus)
SCK3 I/O
PFC915
0
1
Specifies operation mode of P915 pin in control mode
A14 output (with separate bus)
SO3 output
PFC914
0
1
Specifies operation mode of P914 pin in control mode
A13 output (with separate bus)
SI3 input
PFC913
0
1
Specifies operation mode of P913 pin in control mode
A12 output (with separate bus)
SCK2 I/O
PFC912
0
1
Specifies operation mode of P912 pin in control mode
After reset: 0000H
R/W
Address: PFC9 FFFFF472H,
PFC9L FFFFF472H, PFC9H FFFFF473H
PFC97
PFC96
PFC95
PFC94
PFC93
PFC92
0
PFC910
PFC99
PFC98
8
9
10
11
12
13
14
15
A11 output (with separate bus)
SO2 output
PFC911
0
1
Specifies operation mode of P911 pin in control mode
A10 output (with separate bus)
SI2 input
PFC910
0
1
Specifies operation mode of P910 pin in control mode
A9 output (with separate bus)
TXD1 output
PFC99
0
1
Specifies operation mode of P99 pin in control mode
Note
When reading or writing bits 8 to 15 of the PFC9 register in 8-bit or 1-bit units, specify these bits as bits 0
to 7 of the PFC9H register.