CHAPTER 12 PORT FUNCTIONS
User’s Manual U12688EJ4V0UM00
392
(2) Input/output mode/control mode setting
Port 9 input/output mode setting is performed by means of the port 9 mode register (PM9), and control mode
(external expansion mode) setting is performed by means of the mode specification pins (MODE0 to MODE3)
and the port 9 mode control register (PMC9).
(a) Port 9 mode register (PM9)
This register can be read/written in 8- or 1-bit units.
Address
FFFFF032H
7
PM97
PM9
6
PM96
5
PM95
4
PM94
3
PM93
2
PM92
1
PM91
0
PM90
After reset
FFH
Bit Position
Bit Name
Function
7 to 0
PM9n (n = 7 to 0)
Port Mode
Sets P9n pin in input/output mode.
0: Output mode (output buffer ON)
1: Input mode (output buffer OFF)
Summary of Contents for V850E/MS1 UPD703100
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