z8f083a ZiLOG Semiconductor, z8f083a Datasheet - Page 38

• Manufacturer Part Number: z8f083a
• Description: High-performance 8-bit Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS026308-1207
Note: Not to Scale
Internal Precision
Internal RESET
VDD = 0.0V
Oscillator
Oscillator
Crystal
signal
Voltage Brownout Reset
V
V
POR
VBO
The devices in the Z8 Encore! F083A Series provide low VBO protection. The VBO
circuit forces the device to the Reset state, when the supply voltage drops below the VBO
threshold voltage (unsafe level). While the supply voltage remains below the POR
threshold voltage (V
After the supply voltage exceeds the POR threshold voltage, the device progresses
through a full system reset sequence, as described in the POR section. Following POR, the
POR status bit in the reset status (RSTSTAT) register is set to 1.
displays VBO operation. For the VBO and POR threshold voltages (V
Electrical Characteristics
The POR level is greater than the VBO level by the specified hysteresis value. This
ensures that the device undergoes a POR after recovering from a VBO condition.
The VBO circuit is either enabled or disabled during STOP mode. Operations during
STOP mode is set by the
VBO_AO, see
Flash Option Bits
Figure 6. Power-On Reset Operation
POR
), the VBO circuit holds the device in reset.
VBO_AO
on page 177.
counter delay
POR
on page 119.
Flash option bit. For more details on configuring
Oscillator
optional XTAL
Start-up
counter delay
Z8 Encore!
Reset and Stop Mode Recovery
Product Specification
Figure 7
VBO
Execution
Program
®
on page 27
F083A Series
and V
VDD = 3.3 V
POR
), see
26