MC9S08DZ16 FREESCALE [Freescale Semiconductor, Inc], MC9S08DZ16 Datasheet - Page 105

• Manufacturer Part Number: MC9S08DZ16
• Description: 8-Bit HCS08 Central Processor Unit (CPU)
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1
1
6.5.5
Port E is controlled by the registers listed below.
6.5.5.1
6.5.5.2
Freescale Semiconductor
PTEDD[7:0]
PTED[7:0]
Reset:
Reads of this bit always return the pin value of the associated pin, regardless of the value stored in the port data direction bit.
Reset:
PTEDD1 has no effect on the input-only PTE1 pin.
Field
Field
7:0
7:0
W
W
R
R
PTEDD7
PTED7
Port E Registers
Port E Data Register Bits — For port E pins that are inputs, reads return the logic level on the pin. For port E
pins that are configured as outputs, reads return the last value written to this register.
Writes are latched into all bits of this register. For port E pins that are configured as outputs, the logic level is
driven out the corresponding MCU pin.
Reset forces PTED to all 0s, but these 0s are not driven out the corresponding pins because reset also configures
all port pins as high-impedance inputs with pull-ups disabled.
Data Direction for Port E Bits — These read/write bits control the direction of port E pins and what is read for
PTED reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port E bit n and PTED reads return the contents of PTEDn.
Port E Data Register (PTED)
0
Port E Data Direction Register (PTEDD)
0
7
7
PTEDD6
PTED6
0
0
6
6
Figure 6-33. Port E Data Direction Register (PTEDD)
Table 6-31. PTEDD Register Field Descriptions
Table 6-30. PTED Register Field Descriptions
Figure 6-32. Port E Data Register (PTED)
PTEDD5
MC9S08DZ60 Series Data Sheet, Rev. 4
PTED5
0
0
5
5
PTEDD4
PTED4
0
0
4
4
Description
Description
PTEDD3
PTED3
3
0
3
0
PTEDD2
PTED2
Chapter 6 Parallel Input/Output Control
0
0
2
2
PTEDD1
PTED1
0
0
1
1
1
1
PTEDD0
PTED0
0
0
0
0
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