mc9s08jm60 Freescale Semiconductor, Inc, mc9s08jm60 Datasheet - Page 90

• Manufacturer Part Number: mc9s08jm60
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 6 Parallel Input/Output
6.5.7
Port D parallel I/O function is controlled by the registers listed below.
6.5.8
In addition to the I/O control, port D pins are controlled by the registers listed below.
90
PTDDD[7:0]
PTDD[7:0]
Reset
Reset
Field
Field
7:0
7:0
W
W
R
R
PTDDD7
PTDD7
Port D I/O Registers (PTDD and PTDDD)
Port D Pin Control Registers (PTDPE, PTDSE, PTDDS)
Port D Data Register Bits — For port D pins that are inputs, reads return the logic level on the pin. For port D
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 D pins that are configured as outputs, the logic level is
driven out the corresponding MCU pin.
Reset forces PTDD 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 pullups disabled.
Data Direction for Port D Bits — These read/write bits control the direction of port D pins and what is read for
PTDD reads.
0 Input (output driver disabled) and reads return the pin value.
1 Output driver enabled for port D bit n and PTDD reads return the contents of PTDDn.
0
0
7
7
PTDDD6
PTDD6
0
0
6
6
Table 6-17. PTDDD Register Field Descriptions
Figure 6-18. Data Direction for Port D (PTDDD)
Table 6-16. PTDD Register Field Descriptions
Figure 6-17. Port D Data Register (PTDD)
PTDDD5
MC9S08JM60 Series Data Sheet, Rev. 2
PTDD5
0
0
5
5
PTDDD4
PTDD4
0
0
4
4
Description
Description
PTDDD3
PTDD3
3
0
3
0
PTDDD2
PTDD2
0
0
2
2
PTDDD1
Freescale Semiconductor
PTDD1
0
0
1
1
PTDDD0
PTDD0
0
0
0
0