Z16FMC64AG20SG Zilog, Z16FMC64AG20SG Datasheet - Page 126

• Manufacturer Part Number: Z16FMC64AG20SG
• Description: Microcontrollers (MCU) 16BIT 64K FL 4K RAM 2UART 12CH 10BIT A/D
• Manufacturer: Zilog
• Series: Z16FMCr

Specifications of Z16FMC64AG20SG

• Processor Series: Z16FMC
• Core: ZNEO
• Data Bus Width: 16 bit
• Program Memory Type: Flash
• Program Memory Size: 64 KB
• Data Ram Size: 4 KB
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 46
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP-64
• Development Tools By Supplier: Z16FMC28200KITG
• Minimum Operating Temperature: 0 C
• 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
• Eeprom Size: -
• 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: 0°C ~ 70°C
• Lead Free Status / Rohs Status: Details

Watchdog Timer
Operation
PS028702-1210
The Watchdog Timer (WDT) helps protect against corrupt or unreliable software, power
faults and other system-level problems which place the Z16FMC device into unsuitable
operating states.
The WDT includes the following features:
•
•
•
The WDT is a retriggerable one-shot timer that resets or interrupts the Z16FMC device
when the WDT reaches its terminal count. The WDT uses its own dedicated on-chip RC
oscillator as its clock source. The WDT features only two modes of operation – on and off.
After it is enabled, the WDT always counts and must be refreshed to prevent a timeout. An
enable is performed by executing the
The
been executed.
To minimize power consumption, the RC oscillator is disabled. The RC oscillator is dis-
abled by clearing the
disabled, the WDT will not operate.
The WDT is a 16-bit reloadable downcounter that uses two 8-bit registers in the CPU reg-
ister space to set the reload value. The nominal WDT timeout period is given by the fol-
lowing equation:
WDT Time-out Period (ms)
where the 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 68 provides information about approximate timeout delays for the minimum,
default and maximum WDT reload values.
On-chip RC oscillator
A selectable timeout response: short reset or system exception
16-bit programmable timeout value
WDT_AO
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
Z16FMC Series Motor Control MCUs
Register. If the RC oscillator is
Product Specification
WDT
WDT_AO
instruction has not
Watchdog Timer
option bit.
104