Z8F6421AN020EC00TR Zilog, Z8F6421AN020EC00TR Datasheet - Page 109
Z8F6421AN020EC00TR
Manufacturer Part Number
Z8F6421AN020EC00TR
Description
IC ENCORE MCU FLASH 64K 44LQFP
Manufacturer
Zilog
Series
Encore!® XP®r
Specifications of Z8F6421AN020EC00TR
Core Processor
Z8
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
31
Program Memory Size
64KB (64K x 8)
Program Memory Type
FLASH
Ram Size
4K x 8
Voltage - Supply (vcc/vdd)
3 V ~ 3.6 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
44-LQFP
For Use With
269-4678 - KIT DEV FOR Z8F642 MCU 44 PIN269-4677 - KIT DEV FOR Z8F642 MCU 28PIN269-4540 - KIT DEV FOR Z8 ENCORE 16K TO 64K
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Other names
Z8F6421AN020EC00T
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 109 of 297
- Download datasheet (9Mb)
PS019921-0308
Watchdog Timer Reload Unlock Sequence
STOP mode. For more information on Stop Mode Recovery, see
Recovery
If interrupts are enabled, following completion of the Stop Mode Recovery the eZ8 CPU
responds to the interrupt request by fetching the Watchdog Timer interrupt vector and exe-
cuting code from the vector address.
WDT Reset in Normal Operation
If configured to generate a Reset when a time-out occurs, the Watchdog Timer forces the
device into the Reset state. The WDT status bit in the Watchdog Timer Control register is
set to 1. For more information on Reset, see
WDT Reset in STOP Mode
If enabled in STOP mode and configured to generate a Reset when a time-out occurs and
the device is in STOP mode, the Watchdog Timer initiates a Stop Mode Recovery. Both
the WDT status bit and the STOP bit in the Watchdog Timer Control register are set to 1
following WDT time-out in STOP mode. Default operation is for the WDT and its RC
oscillator to be enabled during STOP mode.
WDT RC Disable in STOP Mode
To minimize power consumption in STOP Mode, the WDT and its RC oscillator can be
disabled in STOP mode. The following sequence configures the WDT to be disabled when
the Z8 Encore! XP
STOP instruction:
1. Write 55H to the Watchdog Timer Control register (WDTCTL).
2. Write AAH to the Watchdog Timer Control register (WDTCTL).
3. Write 81H to the Watchdog Timer Control register (WDTCTL) to configure the WDT
This sequence only affects WDT operation in STOP mode.
Writing the unlock sequence to the Watchdog Timer (WDTCTL) Control register address
unlocks the three Watchdog Timer Reload Byte registers (WDTU, WDTH, and WDTL) to
allow changes to the time-out period. These write operations to the WDTCTL register
address produce no effect on the bits in the WDTCTL register. The locking mechanism
prevents spurious writes to the Reload registers. Follow the steps below to unlock the
Watchdog Timer Reload Byte registers (WDTU, WDTH, and WDTL) for write access.
1. Write
and its oscillator to be disabled during STOP Mode. Alternatively, write 00H to the
Watchdog Timer Control register (WDTCTL) as the third step in this sequence to
reconfigure the WDT and its oscillator to be enabled during STOP mode.
on page 45.
55H
to the Watchdog Timer Control register (WDTCTL).
®
F64XX Series devices enter STOP Mode following execution of a
Reset and Stop Mode Recovery
Z8 Encore! XP
Product Specification
Reset and Stop Mode
®
F64XX Series
Watchdog Timer
on page 45.
95
Related parts for Z8F6421AN020EC00TR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Communication Controllers, ZILOG INTELLIGENT PERIPHERAL CONTROLLER (ZIP)
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
KIT DEV FOR Z8 ENCORE 16K TO 64K
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
KIT DEV Z8 ENCORE XP 28-PIN
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
DEV KIT FOR Z8 ENCORE 8K/4K
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
KIT DEV Z8 ENCORE XP 28-PIN
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
DEV KIT FOR Z8 ENCORE 4K TO 8K
Manufacturer:
Zilog
Datasheet:
Part Number:
Description:
CMOS Z8 microcontroller. ROM 16 Kbytes, RAM 256 bytes, speed 16 MHz, 32 lines I/O, 3.0V to 5.5V
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
Low-cost microcontroller. 512 bytes ROM, 61 bytes RAM, 8 MHz
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
Z8 4K OTP Microcontroller
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
CMOS SUPER8 ROMLESS MCU
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
SL1866 CMOSZ8 OTP Microcontroller
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
SL1866 CMOSZ8 OTP Microcontroller
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
OTP (KB) = 1, RAM = 125, Speed = 12, I/O = 14, 8-bit Timers = 2, Comm Interfaces Other Features = Por, LV Protect, Voltage = 4.5-5.5V
Manufacturer:
Zilog, Inc.
Datasheet:
Part Number:
Description:
Manufacturer:
Zilog, Inc.
Datasheet: