Z16F2810VH20EG Zilog, Z16F2810VH20EG Datasheet - Page 255

• Manufacturer Part Number: Z16F2810VH20EG
• Description: IC ZNEO MCU FLASH 128K 68PLCC
• Manufacturer: Zilog
• Series: Encore!® ZNEOr

Specifications of Z16F2810VH20EG

• Core Processor: ZNEO
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 68-LCC (J-Lead)
• Data Bus Width: 16 bit
• Data Ram Size: 4 B
• Interface Type: ESPI, I2C, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 46
• Number Of Timers: 4
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 12 Channel
• For Use With: 770-1003 - ISP 4PORT FOR ZILOG ZNEO MCU269-4537 - DEV KIT FOR Z16F ZNEO
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-4691-5; Z16F2810VH20EG

Watchdog Timer
Operation
PS022008-0810
WDT Time-out Period (ms)
The Watchdog Timer (WDT) helps protect against corrupt or unreliable software, power
faults, and other system-level problems which places the ZNEO
unsuitable operating states.
The WDT includes the following features:
•
•
•
The WDT is a retriggerable one-shot timer that resets or interrupts the ZNEO Z16F Series
device, when the WDT reaches its terminal count. The WDT uses its own dedicated 
on-chip RC oscillator as its clock source. The WDT has only two modes of operation—on
and off. Once enabled, it always counts and must be refreshed to prevent a time-out. An
enable is performed by executing the
The
been executed.
To minimize power consumption, the RC oscillator is disabled. The RC oscillator is 
disabled by clearing the
is disabled, the WDT will not operate.
The WDT is a 16-bit reloadable downcounter that uses two 8-bit registers in the ZNEO
CPU register space to set the reload value. The nominal WDT time-out period is given by
the following equation:
where, WDT reload value is the decimal value of the 16-bit value given by {WDTH[7:0],
WDTL[7:0]} and the typical Watchdog Timer RC oscillator frequency is 10 kHz.
Table 119
minimum, default, and maximum WDT reload values.
On-chip RC oscillator.
A selectable time-out response: short reset or system exception.
16-bit programmable time-out value.
WDT_AO
on page 240 provides information on approximate time-out delays for the 
bit enables the WDT to operate all the time, even if a
WDTEN
P R E L I M I N A R Y
bit in the
=
WDT Reload Value
------------------------------------------------- -
WDT
Oscillator Control
instruction or by setting the
10
Register. If the RC oscillator
®
Product Specification
Z16F Series device into
WDT
ZNEO
WDT_AO
instruction has not
Watchdog Timer
Z16F Series
option bit.
239