z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 73

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

PS022006-0207
Internal Precision
Internal RESET
System Clock
Not to Scale
V
Oscillator
CC
Signal
Power-On Reset
Voltage Brownout Reset
= 0.0 V
V
V
POR
VBO
Each device in the ZNEO Z16F Series contains an internal POR circuit. The POR circuit
monitors the supply voltage and holds the device in the Reset state until the supply voltage
reaches a safe operating level. After the supply voltage exceeds the POR voltage threshold
(V
this point, the system clock is enabled and the POR counter counts a total of 16 system
clock pulses. The device is held in the Reset state until the second POR counter sequence
has timed out. After the ZNEO Z16F Series exits the POR state, the ZNEO CPU fetches
the Reset vector. Following POR, the POR status bit in the
Register
Figure 15
STOP Mode Current Versus V
The ZNEO Z16F Series provides Low Voltage Brownout (VBO) protection. The VBO
circuit senses the supply voltage when it drops to an unsafe level (below the VBO
threshold voltage) and forces the device into the Reset state. While the supply voltage
POR
) and has stabilized, the POR counter is enabled and counts 50 cycles of the IPO. At
on page 63 is set to 1.
illustrates Power-on reset operation. For the POR threshold voltage (V
Oscillator
Start-up
Figure 15. Power-on reset Operation
P R E L I M I N A R Y
Counter Delay
Option Bit
dd
on page 340.
Counter Delay
System Clock
Reset and Stop Mode Recovery
Reset Status and Control
Product Specification
ZNEO
Execution
Program
™
V
Z16F Series
CC
POR
= 3.3 V
), see
59