MC9S08JM16CGTE FREESCALE [Freescale Semiconductor, Inc], MC9S08JM16CGTE Datasheet - Page 29

• Manufacturer Part Number: MC9S08JM16CGTE
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

2.3.7
The USBDP (D+) and USBDN (D–) pins are the analog input/output lines to/from full-speed internal
USB transceiver. An optional internal pullup resistor for the USBDP pin, R
2.3.8
The MC9S08JM16 series of MCUs support up to 37 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
Input/Output.”
appropriate module chapter.
Immediately after reset, all pins are configured as high-impedance general-purpose inputs with internal
pullup devices disabled.
Freescale Semiconductor
USB Data Pins (USBDP, USBDN)
General-Purpose I/O and Peripheral Ports
When an alternative function is first enabled, it is possible to get a spurious
edge to the module, user software must clear out any associated flags before
interrupts are enabled.
are enabled. The highest priority module will have control over the pin.
Selecting a higher priority pin function with a lower priority function
already enabled can cause spurious edges to the lower priority module.
Disable all modules that share a pin before enabling another module.
For information about how and when on-chip peripheral systems use these pins, see the
MC9S08JM16 Series Data Sheet, Rev. 2
Table 2-1
illustrates the priority if multiple modules
NOTE
PUDP
Chapter 2 Pins and Connections
, is available.
Chapter 6, “Parallel
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