Z8F0813HJ005EG Zilog, Z8F0813HJ005EG Datasheet - Page 80

• Manufacturer Part Number: Z8F0813HJ005EG
• Description: IC Z8 ENCORE MCU FLASH 8K 28SSOP
• Manufacturer: Zilog
• Series: Encore!® XP®r

Specifications of Z8F0813HJ005EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 5MHz
• Connectivity: IrDA, UART/USART
• Peripherals: Brown-out Detect/Reset, LED, POR, PWM, WDT
• Number Of I /o: 24
• 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-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Other names: 269-4182; Z8F0813HJ005EG

PS025203-0405
Caution:
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. Enable the timer interrupt (if appropriate) and set the timer interrupt priority by
5. Configure the associated GPIO port pin (if using the Timer Output function) for the
6. Write to the Timer Control register to enable the timer and initiate counting.
In CONTINUOUS mode, the system clock always provides the timer input. The timer
period is given by the following equation:
If an initial starting value other than
registers, use the ONE-SHOT mode equation to determine the first time-out period.
COUNTER Mode
In COUNTER mode, the timer counts input transitions from a GPIO port pin. The timer
input is taken from the GPIO Port pin Timer Input alternate function. The TPOL bit in the
Timer Control Register selects whether the count occurs on the rising edge or the falling
edge of the Timer Input signal. In COUNTER mode, the prescaler is disabled.
Upon reaching the Reload value stored in the Timer Reload High and Low Byte registers,
the timer generates an interrupt, the count value in the Timer High and Low Byte registers
is reset to
enabled, the Timer Output pin changes state (from Low to High or from High to Low) at
timer Reload.
The steps for configuring a timer for COUNTER mode and initiating the count are as fol-
lows:
1. Write to the Timer Control register to:
Continuous Mode Time-Out Period (s)
The input frequency of the Timer Input signal must not exceed one-fourth the system
clock frequency.
–
0001H). This action only affects the first pass in CONTINUOUS mode. After the first
timer Reload in CONTINUOUS mode, counting always begins at the reset value of
0001H
writing to the relevant interrupt registers.
Timer Output alternate function.
–
–
If using the Timer Output alternate function, set the initial output level (High or
Low).
Disable the timer
Configure the timer for COUNTER mode
0001H
.
and counting resumes. Also, if the Timer Output alternate function is
P R E L I M I N A R Y
0001H
=
is loaded into the Timer High and Low Byte
--------------------------------------------------------------------------- -
System Clock Frequency (Hz)
Reload Value Prescale
Z8 Encore!
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Product Specification
®
Z8F0823 Series
Timers
63