MC9S08JM60_09 Datasheet, PDF (32/388 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers

Chapter 2 Pins and Connections
2.3.7 USB Data Pins (USBDP, USBDN)
The USBDP (D+) and USBDN (D–) pins are the analog input/output lines to/from full-speed internal USB
transciever. An optional internal pullup resistor for the USBDP pin, R_PUDP, is available.
2.3.8 General-Purpose I/O and Peripheral Ports
The MC9S08JM60 series of MCUs support up to 51 general-purpose I/O pins, which are shared with
on-chip peripheral functions (timers, serial I/O, ADC, keyboard interrupts, etc.).
When a port pin is configured as a general-purpose output or a peripheral uses the port pin as an output,
software can select one of two drive strengths and enable or disable slew rate control. When a port pin is
configured as a general-purpose input or a peripheral uses the port pin as an input, software can enable a
pullup device.
For information about controlling these pins as general-purpose I/O pins, see the Chapter 6, “Parallel
Input/Output.” For information about how and when on-chip peripheral systems use these pins, see the
appropriate module chapter.
Immediately after reset, all pins are configured as high-impedance general-purpose inputs with internal
pullup devices disabled.
MC9S08JM60 Series Data Sheet, Rev. 3
32
Freescale Semiconductor