UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 173
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UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
- Current page: 173 of 759
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5.7.2 Input/Output Mode/Control Mode Setting
mode register (MM: See Figure 21-1) as shown in Table 5-8.
The port 5 input/output mode is set for each pin by means of the port 5 mode register (PM5) as shown in Figure 5-46.
When port 5 pins can be used as port or address pins in 2-bit units, the setting is performed by means of the memory extension
In the PD784021, port 5 only operates as the address bus (A8 to A15).
MM3
0
0
0
0
0
0
1
1
PM5
MM2
PM57
0
0
1
1
1
1
0
0
7
MM Bits
PM56
6
MM1
0
1
0
0
1
1
0
0
PM55
5
MM0
0
1
0
1
0
1
0
1
Figure 5-46 Port 5 Mode Register (PM5) Format
PM54
4
Table 5-8 Port 5 Operating Modes
PM53
P50
A8
A8
A8
A8
CHAPTER 5 PORT FUNCTIONS
3
PM52
2
P51
A9
A9
A9
A9
PM51
1
P52
A10
A10
A10
PM50
0
PM5n
0FF25H
Port (P50 to P57)
Address
Operating Mode
P53
A11
A11
A11
0
1
P5n Pin Input/Output Mode
Specification (n = 0 to 7)
Output mode (output buffer on)
Intput mode (output buffer off)
On Reset
A12
A12
P54
FFH
Port
P55
A13
A13
R/W
R/W
Port
P56
A14
Port
P57
A15
133
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