EZ80F91MCU ZILOG [Zilog, Inc.], EZ80F91MCU Datasheet - Page 82

• Manufacturer Part Number: EZ80F91MCU
• Description: eZ80Acclaim-TM Flash Microcontrollers
• Manufacturer: ZILOG [Zilog, Inc.]

PS019209-0504
Table 7. Port x Data Registers
(PA_DR = 0096h, PB_DR = 009Ah, PC_DR = 009Eh, PD_DR = 00A2h)
Port x Data Direction Registers
In conjunction with the other GPIO Control Registers, the Port x Data Direction
registers, detailed in Table 8, control the operating modes of the GPIO port pins.
See
all alternate function modes.
Table 8. Port x Data Direction Registers
(PA_DDR = 0097h, PB_DDR = 009Bh, PC_DDR = 009Fh, PD_DDR = 00A3h)
Port x Alternate Register 1
In conjunction with the other GPIO Control Registers, the Port x Alternate
Register 1, detailed in Table 9, controls the operating modes of the GPIO port
pins. Px_DDR does not indicate the GPIO direction in all alternate function
modes. See
Table 9. Port x Alternate Registers 1
(PA_ALT1 = 0098h, PB_ALT1 = 009Ch, PC_ALT1 = 00A0h, PD_ALT1 = 00A4h)
Bit
Reset
CPU Access
Note: X = Undefined; R/W = Read/Write.
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Bit
Reset
CPU Access
Note: R/W = Read/Write.
Table 6
for more information. Px_DDR does not indicate the GPIO direction in
Table 6
for more information.
R/W
R/W
R/W
P R E L I M I N A R Y
X
7
7
1
7
0
R/W
R/W
R/W
6
X
6
1
6
0
R/W
R/W
R/W
X
5
5
1
5
0
R/W
R/W
R/W
X
4
4
1
4
0
R/W
R/W
R/W
X
3
3
1
3
0
General-Purpose Input/Output
Product Specification
R/W
R/W
R/W
X
2
2
1
2
0
eZ80F91 MCU
R/W
R/W
R/W
X
1
1
1
1
0
R/W
R/W
R/W
X
0
0
1
0
0
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