Z8F011ASH020EG2156 ZiLOG, Z8F011ASH020EG2156 Datasheet - Page 113

• Manufacturer Part Number: Z8F011ASH020EG2156
• Description: 8-bit Microcontrollers - MCU 1K FLASH 256B RAM 16B NVDS
• Manufacturer: ZiLOG

Specifications of Z8F011ASH020EG2156

• Rohs: yes
• Core: eZ8
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 20 MHz
• Program Memory Size: 1 KB
• Data Ram Size: 256 B
• On-chip Adc: No
• Package / Case: SOIC-20
• Mounting Style: SMD/SMT
• Interface Type: UART
• Maximum Operating Temperature: + 105 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 17
• Number Of Timers: 2
• Program Memory Type: Flash
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 2.7 V

PS025113-1212
Bit
Field
RESET
R/W
Address
Bit
[7:0]
WDTUNLK
Watchdog Timer Control Register Definitions
Watchdog Timer Control Register
Description
Watchdog Timer Unlock
The user software must write the correct unlocking sequence to this register before it is
allowed to modify the contents of the Watchdog Timer Reload registers.
W
X
7
This section defines the features of the following Watchdog Timer Control registers.
Watchdog Timer Control Register
Watchdog Timer Reload Low Byte Register
Watchdog Timer Reload Upper Byte Register
Watchdog Timer Reload High Byte Register
The Watchdog Timer Control (WDTCTL) Register is a write-only control register. Writ-
ing the unlock sequence:
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 have no
effect on the bits in the WDTCTL Register. The locking mechanism prevents spurious
writes to the reload registers.
This register address is shared with the read-only Reset Status Register.
Table 59. Watchdog Timer Control Register (WDTCTL)
W
6
X
W
X
5
55H
,
AAH
(WDTCTL): see page 95
W
to the WDTCTL Register address unlocks the three
X
4
WDTUNLK
FF0H
(WDTL): see page 97
(WDTH): see page 96
Watchdog Timer Control Register Definitions
(WDTU): see page 96
W
X
3
W
X
Z8 Encore!
2
Product Specification
W
X
1
®
F0830 Series
W
X
0
95