20-668-0003 Rabbit Semiconductor, 20-668-0003 Datasheet - Page 124
![IC CPU RABBIT2000 30MHZ 100PQFP](/photos/6/76/67658/316-100-pqfp_sml.jpg)
20-668-0003
Manufacturer Part Number
20-668-0003
Description
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0003.pdf
(228 pages)
Specifications of 20-668-0003
Processor Type
Rabbit 2000 8-Bit
Speed
30MHz
Voltage
2.7V, 3V, 3.3V, 5V
Mounting Type
Surface Mount
Package / Case
100-MQFP, 100-PQFP
Data Bus Width
8 bit
Maximum Clock Frequency
30 MHz
Operating Supply Voltage
0 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
40
Number Of Timers
8 & 10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
20-668-0003
316-1062
316-1062
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
20-668-0003
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
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Timer B can be used for various purposes. The 10-bit counter can be read to record the
time at which an event takes place. If the event creates an interrupt, the timer can be read
in the interrupt routine. The known time of execution of the interrupt routine can be sub-
tracted. The variable interrupt latency is then the uncertainty in the event time. This can be
as little 19 clocks if the interrupt is the highest priority interrupt. If the system clock is 20
MHz, the counter can count as fast as 10 MHz. The uncertainty in a pulse width measure-
ment can be nearly as low as 38 clocks (2 x 19), or about 2 µs for a 20 MHz system clock.
Timer B can be used to change a parallel port output register at a particular specified time
in the future. A pulse train with edges at arbitrary times can be generated with the restric-
tion that two adjacent edges cannot be too close to each other since an interrupt must be
serviced after each edge to set up the time for the next edge. This restriction limits the
minimum pulse width to about 5 µs, depending on the clock speed and interrupt priorities.
118
Rabbit 2000 Microprocessor User’s Manual
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