Z8F0812SJ020EC Zilog, Z8F0812SJ020EC Datasheet - Page 89
Z8F0812SJ020EC
Manufacturer Part Number
Z8F0812SJ020EC
Description
IC ENCORE MCU FLASH 8K 28SOIC
Manufacturer
Zilog
Series
Encore!® XP®r
Datasheet
1.Z8F08200100KIT.pdf
(264 pages)
Specifications of Z8F0812SJ020EC
Core Processor
Z8
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, IrDA, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
19
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Other names
269-3228
- Current page: 89 of 264
- Download datasheet (6Mb)
PS022517-0508
4. If required, enable the timer interrupt and set the timer interrupt priority by writing to
5. If using the Timer Output function, configure the associated GPIO port pin for the
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 is calculated by the following equation:
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 if a Timer Input signal
deassertion generated the interrupt, read the associated GPIO input value and compare 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. When reaching the Reload value, the
timer generates an interrupt, the count value in the Timer High and Low Byte Registers is
reset to
Also, 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.
Follow the steps below for configuring a timer for GATED mode and 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. This
3. Write to the Timer Reload High and Low Byte Registers to set the Reload value
4. If desired, enable the timer interrupt and set the timer interrupt priority by writing to
5. Configure the associated GPIO port pin for the Timer Input alternate function
6. Write to the Timer Control Register to enable the timer
7. Assert the Timer Input signal to initiate the counting
Compare Mode Time (s)
the relevant interrupt registers
Timer Output alternate function
–
–
–
only affects the first pass in GATED mode. After the first timer reset in GATED mode,
counting always begins at the reset value of
the relevant interrupt registers
0001H
Disable the timer
Configure the timer for GATED mode
Set the prescale value
and counting resumes (assuming the Timer Input signal is still asserted).
=
(
------------------------------------------------------------------------------------------------------------ -
Compare Value Start Value
System Clock Frequency (Hz)
–
0001H
Z8 Encore! XP
)
x
Prescale
Product Specification
®
F0822 Series
Timers
76
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