Z8F011ASH020EG2156 ZiLOG, Z8F011ASH020EG2156 Datasheet - Page 98

• 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
4. Enable the timer interrupt and set the timer interrupt priority by writing to the relevant
5. If using the timer output function, configure the associated GPIO port pin for the timer
6. Write to the Timer Control Register to enable the timer and initiate counting.
In COMPARE Mode, the system clock always provides the timer input. The compare time
can be calculated by the following equation:
Compare Mode Time (s)
GATED Mode
In GATED Mode, the timer counts only when the timer input signal is in its active state
(asserted), as determined by the TPOL bit in the Timer Control Register. When the timer
input signal is asserted, counting begins. A timer interrupt is generated when the timer
input signal is deasserted or a timer reload occurs. To determine whether the timer input
signal deassertion generated the interrupt, read the associated GPIO input value and com-
pare to the value stored in the TPOL bit.
The timer counts up to the 16-bit reload value stored in the Timer Reload High and Low
Byte registers. The timer input is the system clock. Upon reaching the reload value, the
timer generates an interrupt, the count value in the Timer High and Low Byte registers is
reset to
Additionally, if the timer output alternate function is enabled, the timer output pin changes
state (from Low to High or from High to Low) at timer reset.
Observe the following steps for configuring a timer for GATED Mode and for initiating
the count:
1. Write to the Timer Control Register to:
2. Write to the Timer High and Low Byte registers to set the starting count value. Writing
3. Write to the Timer Reload High and Low Byte registers to set the reload value.
4. Enable the timer interrupt and set the timer interrupt priority by writing to the relevant
interrupt registers.
output alternate function.
–
–
–
these registers only affects the first pass in GATED Mode. After the first timer reset in
GATED Mode, counting always begins at the reset value of
interrupt registers. By default, the timer interrupt is generated for both input deasser-
0001H
Disable the timer
Configure the timer for GATED Mode
Set the prescale value
and counting resumes (assuming the timer input signal remains asserted).
=

----------------------------------------------------------------------------------------------------- -
Compare Value Start Value
System Clock Frequency (Hz)
–
 Prescale
Z8 Encore!

0001H
Product Specification
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®
F0830 Series
Operation
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