Z8F64220100ZDA Zilog, Z8F64220100ZDA Datasheet - Page 93

• Manufacturer Part Number: Z8F64220100ZDA
• Description: ADAPTER ICE Z8 ENCORE 64K 64LQFP
• Manufacturer: Zilog

Specifications of Z8F64220100ZDA

• Module/board Type: *
• For Use With/related Products: Z8 Encore!™
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3403

PS019921-0308
One-Shot time-out, first set the TPOL bit in the Timer Control 1 Register to the start value
before beginning ONE-SHOT mode. Then, after starting the timer, set TPOL to the oppo-
site bit value.
Follow the steps below for configuring a timer for ONE-SHOT mode and initiating the
count:
1. Write to the Timer Control 1 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 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 1 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 1 register to:
ONE-SHOT Mode Time-Out Period (s)
–
–
–
–
the relevant interrupt registers
Timer Output alternate function
–
–
–
–
Disable the timer
Configure the timer for ONE-SHOT mode
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)
=
0001H
(
------------------------------------------------------------------------------------------------ -
Reload Value Start Value
System Clock Frequency (Hz)
and counting resumes. Also, if the Timer
–
Z8 Encore! XP
Product Specification
)
×
Prescale
®
F64XX Series
Timers
79