Z8F042AHH020EC Zilog, Z8F042AHH020EC Datasheet - Page 82

• Manufacturer Part Number: Z8F042AHH020EC
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020EC

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, LVD, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 17
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 128 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 7x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3368

PS022825-0908
Also, if the Timer Output alternate function is enabled, the Timer Output pin changes state
for one system clock cycle (from Low to High or from High to Low) upon timer Reload. If
it is appropriate to have the Timer Output make a state change at a One-Shot time-out
(rather than a single cycle pulse), first set the TPOL bit in the Timer Control Register to
the start value before enabling ONE-SHOT mode. After starting the timer, set TPOL to the
opposite bit value.
Follow the steps below for configuring a timer for ONE-SHOT 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.
3. Write to the Timer Reload High and Low Byte registers to set the Reload value.
4. If appropriate, enable the timer interrupt and set the timer interrupt priority by writing
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 ONE-SHOT mode, the system clock always provides the timer input. The timer period
is given by the following equation:
CONTINUOUS Mode
In CONTINUOUS mode, 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
Output alternate function is enabled, the Timer Output pin changes state (from Low to
High or from High to Low) at timer Reload.
Follow the steps below for configuring a timer for CONTINUOUS mode and initiating the
count:
1. Write to the Timer Control register to:
–
–
–
–
to the relevant interrupt registers.
Timer Output alternate function.
–
–
ONE-SHOT Mode Time-Out Period s ( )
Disable the timer
Configure the timer for ONE-SHOT mode.
Set the prescale value.
Set the initial output level (High or Low) if using the Timer Output alternate
function.
Disable the timer
Configure the timer for CONTINUOUS mode.
0001H
=
Reload Value Start Value
----------------------------------------------------------------------------------------------------------------- -
and counting resumes. Also, if the Timer
System Clock Frequency Hz
Z8 Encore! XP
–
Product Specification
®
F082A Series
×
Prescale
(
)
Timers
71