Z8FMC04100 ZILOG [Zilog, Inc.], Z8FMC04100 Datasheet - Page 46
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Z8FMC04100
Manufacturer Part Number
Z8FMC04100
Description
Z8 Encore-R Motor Control Flash MCUs
Manufacturer
ZILOG [Zilog, Inc.]
Datasheet
1.Z8FMC04100.pdf
(402 pages)
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Z8 Encore!
Product Specification
Reset and Stop-Mode Recovery
Operating Mode System Reset Source
Normal or HALT
modes
STOP mode
System Reset
®
Motor Control Flash MCUs
During a system reset, the Z8FMC16100 Series Flash MCU is held in RESET for 66
cycles of the Internal Precision Oscillator. At the beginning of RESET, all GPIO pins are
configured as inputs. All GPIO programmable pull-ups are disabled.
At the start of a System Reset, the motor control PWM outputs are forced to high-imped-
ance momentarily. When the Option Bits that control the off-state have been properly
evaluated the PWM outputs are forced to the programmed off-state.
During RESET, the eZ8 CPU and on-chip peripherals are idle; however, the Internal Preci-
sion Oscillator and Watch-Dog Timer oscillator continue to run. During the first 50 clock
cycles the internal option bit registers are initialized, after which the system clock for the
core and peripherals begins operating. The eZ8 CPU and on-chip peripherals remain idle
through the next 16 cycles of the system clock after which time the internal reset signal is
deasserted.
Upon RESET, control registers within the Register File that have a defined reset value are
loaded with their reset values. Other control registers (including the Flags) and general-
purpose RAM are undefined following RESET. The eZ8 CPU fetches the RESET vector
at Program Memory addresses
Counter. Program execution begins at the RESET vector address.
Table 7 lists the system reset sources as a function of the operating mode. The text follow-
ing provides more detailed information on the individual RESET sources. Please note that
a Power-On Reset/Voltage Brown-Out event always has priority over all other possible
reset sources to ensure a full system reset occurs.
Power-On Reset/Voltage Brown-Out
Watch-Dog Timer time-out when
configured for reset.
RESET pin assertion.
Write OCDCTL[0] to 1.
Fault detect logic reset.
Power-On Reset/Voltage Brown-Out.
RESET pin assertion.
Fault detect logic reset.
Table 7. System Reset Sources and Resulting Reset Action
P R E L I M I N A R Y
0002h
and
0003h
Action
System Reset.
System Reset.
System Reset except the On-Chip
Debugger is not reset.
System Reset.
System Reset.
System Reset.
System Reset.
System Reset.
and loads that value into the Program
PS024604-1005
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