Z8F042AHH020SC00TR Zilog, Z8F042AHH020SC00TR Datasheet - Page 85

• Manufacturer Part Number: Z8F042AHH020SC00TR
• Description: IC ENCORE XP MCU FLASH 4K 20SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F042AHH020SC00TR

• 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: 0°C ~ 70°C
• Package / Case: 20-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: Z8F042AHH020SC00T

PS022825-0908
Follow the steps below for configuring a timer for COMPARATOR COUNTER 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 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.
In COMPARATOR COUNTER mode, the number of comparator output transitions since
the timer start is given by the following equation:
PWM SINGLE OUTPUT Mode
In PWM SINGLE OUTPUT mode, the timer outputs a Pulse-Width Modulator (PWM)
output signal through a GPIO Port pin. The timer input is the system clock. The timer first
counts up to the 16-bit PWM match value stored in the Timer PWM High and Low Byte
registers. When the timer count value matches the PWM value, the Timer Output toggles.
The timer continues counting until it reaches the Reload value stored in the Timer Reload
High and Low Byte registers. Upon reaching the Reload value, the timer generates an
interrupt, the count value in the Timer High and Low Byte registers is reset to
counting resumes.
If the TPOL bit in the Timer Control register is set to 1, the Timer Output signal begins as
a High (1) and transitions to a Low (0) when the timer value matches the PWM value. The
Timer Output signal returns to a High (1) after the timer reaches the Reload value and is
reset to
–
–
–
action only affects the first pass in COMPARATOR COUNTER mode. After the first
timer Reload in COMPARATOR COUNTER mode, counting always begins at the
reset value of
High and Low Byte registers must be written with the value
to the relevant interrupt registers.
Timer Output alternate function.
Comparator Output Transitions
0001H
Disable the timer.
Configure the timer for COMPARATOR COUNTER mode.
Select either the rising edge or falling edge of the comparator output signal for the
count. This also sets the initial logic level (High or Low) for the Timer Output
alternate function. However, the Timer Output function is not required to be
enabled.
.
0001H
. Generally, in COMPARATOR COUNTER mode the Timer
=
Current Count Value
Z8 Encore! XP
–
Start Value
Product Specification
0001H
.
®
F082A Series
0001H
Timers
and
74