upd78f0730 Renesas Electronics Corporation., upd78f0730 Datasheet - Page 76

• Manufacturer Part Number: upd78f0730
• Description: 8-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

4.3 Registers Controlling Port Function
(1) Port mode registers (PM0, PM1, PM3, PM6, and PM12)
76
Symbol
PM12
Port functions are controlled by the following three types of registers.
• Port mode registers (PM0, PM1, PM3, PM6, PM12)
• Port registers (P0, P1, P3, P6, P12)
• Pull-up resistor option registers (PU0, PU1, PU3, PU12)
PM0
PM1
PM3
PM6
These registers specify input or output mode for the port in 1-bit units.
These registers can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets these registers to FFH.
When port pins are used as alternate-function pins, set the port mode register by referencing 4.5 Settings of
Port Mode Register and Output Latch When Using Alternate Function.
PMmn
PM17
7
1
1
1
1
0
1
Output mode (output buffer on)
Input mode (output buffer off)
PM16
6
1
1
1
1
PM15
5
1
1
1
1
Figure 4-15. Format of Port Mode Register
PM14
Preliminary User’s Manual U19014EJ1V0UD
4
1
1
1
1
CHAPTER 4 PORT FUNCTIONS
PM13
PM33
3
1
1
1
(m = 0, 1, 3, 6, 12; n = 0 to 7)
Pmn pin I/O mode selection
PM122
PM12
PM32
2
1
1
PM121
PM01
PM11
PM31
PM61
1
PM120
PM00
PM10
PM30
PM60
0
Address
FF2CH
FF20H
FF21H
FF23H
FF26H
After reset
FFH
FFH
FFH
FFH
FFH
R/W
R/W
R/W
R/W
R/W
R/W