PXS20 Datasheet, PDF (54/119 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Package pinouts and signal descriptions
2.3 System pins
Table 6. System pins
Symbol
Description
Direction
MDO0¹
NMI²
Dedicated pins
Nexus Message Data Output — line 0
Non Maskable Interrupt
Output only
Input only
XTAL
Input for oscillator amplifier circuit and internal clock generator
Input only
EXTAL
TMS²
TCK²
JCOMP³
Oscillator amplifier output
JTAG state machine control
JTAG clock
JTAG compliance select
Output only
Input only
Input only
Input only
Reset pin
RESET
Bidirectional reset with Schmitt-Trigger characteristics and noise filter. Bidirectional
This pin has medium drive strength.
Test pin
VPP TEST Pin for testing purpose only. To be tied to ground in normal
operating mode.
1 _{This pad is configured for Fast (F) pad speed.}
2 _{This pad contains a weak pull-up.}
3 _{This pad contains a weak pull-down.}
Pin #
144 257
pkg pkg
9 E1
1 E4
29 N1
30 R1
87 M16
88 L15
123 C10
31 P2
107 D15
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.
PXS20 Microcontroller Data Sheet, Rev. 1
54
Freescale Semiconductor
Preliminary—Subject to Change Without Notice