Z8F6401AN020SC00TR Zilog, Z8F6401AN020SC00TR Datasheet - Page 84

• Manufacturer Part Number: Z8F6401AN020SC00TR
• Description: IC ENCORE MCU FLASH 64K 44LQFP
• Manufacturer: Zilog
• Series: Encore!®r

Specifications of Z8F6401AN020SC00TR

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 31
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 44-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: Z8F6401AN020SC00T

Timer Control Register Definitions
PS017610-0404
Reading the Timer Count Values
Timer Output Signal Operation
Timer 0-3 High and Low Byte Registers
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. Counting begins on the first appropriate transition of the Timer Input signal. No
In Capture/Compare mode, the elapsed time from timer start to Capture event can be cal-
culated using the following equation:
The current count value in the timers can be read while counting (enabled). This capability
has no effect on timer operation. When the timer is enabled and the Timer High Byte reg-
ister is read, the contents of the Timer Low Byte register are placed in a holding register. A
subsequent read from the Timer Low Byte register returns the value in the holding register.
This operation allows accurate reads of the full 16-bit timer count value while enabled.
When the timers are not enabled, a read from the Timer Low Byte register returns the
actual value in the counter.
Timer Output is a GPIO Port pin alternate function. Generally, the Timer Output is toggled
every time the counter is reloaded.
Timers 0–2 are available in all packages. Timer 3 is available only in the 64-, 68- and 80-
pin packages.
The Timer 0-3 High and Low Byte (TxH and TxL) registers (Tables 38 and 39) contain the
current 16-bit timer count value. When the timer is enabled, a read from TxH causes the
value in TxL to be stored in a temporary holding register. A read from TMRL always
returns this temporary register when the timers are enabled. When the timer is disabled,
reads from the TMRL reads the register directly.
Writing to the Timer High and Low Byte registers while the timer is enabled is not recom-
mended. There are no temporary holding registers available for write operations, so simul-
taneous 16-bit writes are not possible. If either the Timer High or Low Byte registers are
Capture Elapsed Time (s)
interrupt is generated by this first edge.
=
(
---------------------------------------------------------------------------------------------------------
Capture Value Start Value
Z8F640x/Z8F480x/Z8F320x/Z8F240x/Z8F160x
System Clock Frequency (Hz)
–
) Prescale
×
Z8 Encore!
Timers
®
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