Z8F042AHH020EG Zilog, Z8F042AHH020EG Datasheet - Page 84

• Manufacturer Part Number: Z8F042AHH020EG
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020EG

• 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: Lead free / RoHS Compliant
• Other names: 269-4156; Z8F042AHH020EG

PS022517-0508
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 desired, 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 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) upon 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:
2. Write to the Timer High and Low Byte registers to set the starting count value (usually
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. If using the Timer Output function, configure the associated GPIO port pin for the
ONE-SHOT Mode Time-Out Period (s)
–
–
the relevant interrupt registers.
Timer Output alternate function.
–
–
–
–
0001H
Reload in CONTINUOUS mode, counting always begins at the reset value of
the relevant interrupt registers.
Timer Output alternate function.
Set the prescale value
If using the Timer Output alternate function, set the initial output level
(High or Low).
Disable the timer
Configure the timer for CONTINUOUS mode
Set the prescale value.
If using the Timer Output alternate function, set the initial output level
(High or Low).
). This only affects the first pass in CONTINUOUS mode. After the first timer
0001H
=
(
------------------------------------------------------------------------------------------------------ -
Reload Value Start Value
and counting resumes. Also, if the Timer
System Clock Frequency (Hz)
Z8 Encore! XP
–
Product Specification
®
)xPrescale
F0822 Series
0001H
Timers
.
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