MCU Parallel Input/Output
MC1321x Reference Manual, Rev. 1.6
13-16
Freescale Semiconductor
PTEDDn — Data Direction for Port E Bit n (n = 0–7)
These read/write bits control the direction of port E pins and what is read for PTED reads.
1 = Output driver enabled for port E bit n and PTED reads return the contents of PTEDn.
0 = Input (output driver disabled) and reads return the pin value.
13.6.6
Port F Registers (PTFD, PTFPE, PTFSE, and PTFDD)
Port F includes eight general-purpose I/O pins that are not shared
with any peripheral module. Port F pins
used as general-purpose I/O pins are controlled by the port F data (PTFD), data direction (PTFDD), pullup
enable (PTFPE), and slew rate control (PTFSE) registers.
Figure 13-14. Port F Registers
PTFDn — Port PTF Data Register Bit n (n = 0–7)
For port F pins that are inputs, reads return the logic level on the pin. For port F 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 F pins that are configured as outputs, the logic
level is driven out the corresponding MCU pin.
Reset forces PTFD 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.
PTFD
Bit 7
6
5
4
3
2
1
Bit 0
Read:
Write:
Reset:
0
0
0
0
0
0
0
0
PTFPE
Read:
Write:
Reset:
0
0
0
0
0
0
0
0
PTFSE
Read:
Write:
Reset:
0
0
0
0
0
0
0
0
PTFDD
Read:
Write:
Reset:
0
0
0
0
0
0
0
0
Summary of Contents for freescale semiconductor MC13211
Page 40: ...MC1321x Pins and Connections MC1321x Reference Manual Rev 1 6 2 6 Freescale Semiconductor...
Page 166: ...Modem Modes of Operation MC1321x Reference Manual Rev 1 6 7 22 Freescale Semiconductor...
Page 172: ...Modem Interrupt Description MC1321x Reference Manual Rev 1 6 8 6 Freescale Semiconductor...
Page 186: ...MCU Modes of Operation MC1321x Reference Manual Rev 1 6 10 8 Freescale Semiconductor...
Page 208: ...MCU Memory MC1321x Reference Manual Rev 1 6 11 22 Freescale Semiconductor...
Page 244: ...MCU Parallel Input Output MC1321x Reference Manual Rev 1 6 13 20 Freescale Semiconductor...
Page 288: ...MCU Central Processor Unit CPU MC1321x Reference Manual Rev 1 6 15 20 Freescale Semiconductor...
Page 308: ...MCU Timer PWM TPM Module MC1321x Reference Manual Rev 1 6 17 16 Freescale Semiconductor...
Page 338: ...Inter Integrated Circuit IIC MC1321x Reference Manual Rev 1 6 19 14 Freescale Semiconductor...
Page 372: ...Development Support MC1321x Reference Manual Rev 1 6 21 20 Freescale Semiconductor...
