MPC5643L datasheet(55/136 Pages) FREESCALE

55 / 136 page

NOTE

None of system pins (except RESET) provides an open drain output.

2.4

Pin muxing

Table 7 defines the pin list and muxing for this device.

Each entry of Table 7 shows all the possible configurations for each pin, via the alternate functions. The default function assigned to each pin after reset is

indicated by ALT0.

NOTE

Pins labeled “NC” are to be left unconnected. Any connection to an external circuit or voltage may cause unpredictable

device behavior or damage.

Pins labeled “Reserved” are to be tied to ground. Not doing so may cause unpredictable device behavior.

TCK2

JTAG clock

Input only

L15

JCOMP5

JTAG compliance select

Input only

123

C10

Reset pin

RESET

Bidirectional reset with Schmitt-Trigger characteristics and noise filter.

This pin has medium drive strength. Output drive is open drain and

must be terminated by an external resistor of value 1KOhm.6

Bidirectional

Test pin

VPP TEST

Pin for testing purpose only. To be tied to ground in normal

operating mode.

107

D15

1 This pad is configured for Fast (F) pad speed.

2 This pad contains a weak pull-up.

3 EXTAL is an "Output" in "crystal" mode, and is an "Input" in "ext clock" mode.

4 In XOSC Bypass Mode, the analog portion of crystal oscillator (amplifier) is disabled. An external clock can be applied

at EXTAL as an input. In XOSC Normal Mode, EXTAL is an output

5 This pad contains a weak pull-down.

6 RESET output shall be considered valid only after the 3.3V supply reaches its stable value.

Table 6. System pins (continued)

Symbol

Description

Direction

Pin #

144

pkg

257

pkg

MPC5643L Datasheet(PDF) 55 Page - Freescale Semiconductor, Inc

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