CHAPTER 4 PORT FUNCTIONS
Preliminary User’s Manual U15905EJ1V0UD
138
(e) Port function register 9 (PF9)
This 16-bit register specifies normal output or N-ch open-drain output.
The PF9 register can be read or written only in 16-bit units. If the higher 8 bits of the PF9 register are used
as PF9H and the lower 8 bits as PF9L, however, PF9H and PF9L can be manipulated in 8-bit or 1-bit units.
PF9
After reset:
0000H R/W
Address:
PF9: FFFFFC72H, PF9H: FFFFFC73H
0
0
0
0
0
0
0
0
PF915
PF914
0
PF912
PF911
0
0
0
8
9
10
11
12
13
14
15
Normal output
N-ch
open-drain output
PF9n
0
1
Controls normal output or N-ch open-drain output (n = 11, 12, 14, or 15)
Cautions 1. The N-ch open-drain output voltage is the normal voltage, not the medium voltage.
2. PF9n = 1 is enabled only in the following cases. Otherwise, the setting is prohibited.
n = 1: SO2
n = 2: SCK2
n = 4: SO3
n = 5: SCK3
(f) Pull-up resistor option register 9 (PU9)
This is a 16-bit register that specifies connection of an internal pull-up resistor.
This register can be read or written only in 16-bit units.
If the higher 8 bits of the PU9 register are used as PU9H and the lower 8 bits as PU9L, however, PU9H
and PU9L can be manipulated in 8-bit or 1-bit units.
Not connected
Connected
PU9n
0
1
Controls connection of internal pull-up resistor (n = 0 to 15)
PU9
After reset:
0000H R/W
Address:
FFFFFC52H, FFFFFC53H
PU97
PU96
PU95
PU94
PU93
PU92
PU91
PU90
PU915
PU914
PU913
PU912
PU911
PU910
PU99
PU98
8
9
10
11
12
13
14
15
Содержание V850ES/SA2 UPD703201
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