Pulse Width Modulator (PWM) Signals
Table 2-9 Interrupt and Program Control Signals (Continued)
No. of
Pins
1
Signal
Name
RESET
Signal
Type
Input
(Schmitt)
State During
Reset
Input
Signal Description
Reset—This input is a direct hardware reset on the processor.
When RESET is asserted low, the controller is initialized and placed
in the Reset state. A Schmitt trigger input is used for noise immunity.
When the RESET pin is deasserted, the initial chip operating mode
is latched from the EXTBOOT pin. The internal reset signal will be
deasserted synchronous with the internal clocks, after a fixed
number of internal clocks.
1
EXTBOOT
Input
(Schmitt)
Input
To ensure a complete hardware reset, RESET and TRST should be
asserted together. The only exception occurs in a debugging
environment when a hardware device reset is required and it is
necessary not to reset the OnCE/JTAG module. In this case, assert
RESET, but do not assert TRST.
External Boot—This input is tied to VDD to force device to boot from
off-chip memory. Otherwise, it is tied to VSS.
2.6 Pulse Width Modulator (PWM) Signals
Table 2-10 Pulse Width Modulator (PWMA) Signals
No. of
Pins
Signal
Name
Signal State During
Type
Reset
Signal Description
6
PWMA0–5 Output
Tri-stated PWMA0–5— These are six PWMA output pins.
3
ISA0–2
Input
(Schmitt)
3 FAULTA0–2 Input
(Schmitt)
Input
Input
ISA0–2— These three input current status pins are used for
top/bottom pulse width correction in complementary channel
operation for PWMA.
FAULTA0–2— These three fault input pins are used for disabling
selected PWMA outputs in cases where fault conditions originate
off-chip.
56F803 Technical Data, Rev. 16
Freescale Semiconductor
13