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10.4.2 System Modules
Table 10-5. System Signal Descriptions
Chip signal name Module signal
name
Description I/O
NMI — Non-maskable interrupt
NOTE: Driving the NMI signal low forces a non-maskable
interrupt, if the NMI function is selected on the
corresponding pin.
I
RESET — Reset bi-directional signal I/O
VDD — MCU power I
VSS — MCU ground I
Table 10-6. EWM Signal Descriptions
Chip signal name Module signal
name
Description I/O
EWM_IN EWM_in EWM input for safety status of external safety circuits. The polarity
of EWM_in is programmable using the EWM_CTRL[ASSIN] bit. The
default polarity is active-low.
I
EWM_OUT EWM_out EWM reset out signal O
10.4.3 Clock Modules
Table 10-7. OSC Signal Descriptions
Chip signal name Module signal
name
Description I/O
EXTAL0 EXTAL External clock/Oscillator input I
XTAL0 XTAL Oscillator output O
Table 10-8. RTC OSC Signal Descriptions
Chip signal name Module signal
name
Description I/O
EXTAL32
XTAL32
Module Signal Description Tables
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
226
Preliminary
Freescale Semiconductor, Inc.
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