mk68901 STMicroelectronics, mk68901 Datasheet - Page 23

• Manufacturer Part Number: mk68901
• Description: Multi.function Peripheral
• Manufacturer: STMicroelectronics

TIMER A.C. CHARACTERISTICS
Definitions :
Error = Indicated Time Value - Actual Time Value
tpsc = t
Internal Timer Mode
PULSE WIDTH MEASUREMENT MODE
EVENT COUNTER MODE
Notes :
Measurement Accuracy (note 1)
Minimum Pulse Width
Minimum Active Time of TAI, TBI
Minimum Inactive Time of TAI, TBI
Single Interval Error (free running) (note 2)
Cumulative Internal Error
Error between Two Timer Reads
Start Timer to Stop Timer Error
Start Timer to Read Timer Error
Start Timer to Interrupt Request Error (note 3)
CLK
1. Error may be cumul a tive if repetitively performed.
2. Error with respect to T
3. Assuming it is possible for the timer to make an interrupt request immediately.
x Prescale Value
OUT
or INT if note 3 is true.
+ (2t
CLK
+ 100ns) to - (tpsc + 6t
+ 0 to – (tpsc + 6t
- 2t
+ 2t
CLK
CLK
to – (4t
to – (tpsc + 4t
(tpsc + 4t
CLK
CLK
CLK
MK68901
+ 100ns)
+ 400ns)
+ 800ns)
100ns
4t
4t
4t
23/33
CLK
CLK
CLK
CLK
CLK
0
)
)