20-668-0011 Rabbit Semiconductor, 20-668-0011 Datasheet - Page 17
20-668-0011
Manufacturer Part Number
20-668-0011
Description
IC MPU RABIT3000A 55.5MHZ128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0011.pdf
(312 pages)
Specifications of 20-668-0011
Processor Type
Rabbit 3000 8-Bit
Speed
55.5MHz
Voltage
2.5V, 2.7V, 3V, 3.3V
Mounting Type
Surface Mount
Package / Case
128-LQFP
Data Bus Width
8 bit
Maximum Clock Frequency
55.5 MHz
Operating Supply Voltage
1.8 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 55 C
Number Of Programmable I/os
56
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
316-1061
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
20-668-0011
Manufacturer:
Rabbit Semiconductor
Quantity:
10 000
- Current page: 17 of 312
- Download datasheet (2Mb)
2. C
LOCKS
2.1 Overview
The Rabbit 3000 supports two separate clocks—the main clock and the 32 kHz clock. The
main clock is used to derive the processor clock and the peripheral clock inside the proces-
sor. The 32 kHz clock is used to drive the asynchronous serial bootstrap, the real-time
clock, the periodic interrupt, and the watchdog timers.
The Rabbit 3000 has a spectrum spreader on the main clock that shortens and lengthens
clock cycles. This has the net effect of reducing the peak energy of clock harmonics by
spreading the spectral energy into nearby frequencies, which reduces EMI and facilitates
government-mandated EMI testing. Gated clocks are used whenever possible to avoid
clocking unused portions of the processor, and separate power-supply pins for the core and
I/O ring further reduce EMI from the Rabbit 3000.
The main clock can be doubled or divided by 2, 4, 6, or 8 to reduce EMI and power con-
sumption. The 32 kHz clock (which can be divided by 2, 4, 8, or 16) can be used instead of
the main clock to generate processor and peripheral clocks as low as 2 kHz for significant
power savings. Note that dividing the 32 kHz clock only affects the processor and periph-
eral clocks; the full 32 kHz signal is still provided to the peripherals (RTC and watchdog
timers) that use it directly. The periodic interrupt is automatically disabled since there is
not enough time to process it when running off the 32 kHz clock.
Chapter 2 Clocks
7
Related parts for 20-668-0011
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
IC CPU RABBIT4000 128-LQFP
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
Microprocessors - MPU Rabbit 3000 TFBGA Microprocessor
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
Microprocessors - MPU Rabbit 4000 LQFP Microprocessor
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
IC, I/O EXPANDER, 8BIT, 40MHZ, TQFP-64
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
SCRs 1.5A 200uA 400V Sensing
Manufacturer:
Littelfuse Inc
Datasheet:
Part Number:
Description:
CARD 6-RELAY SMARTSTAR SR9500
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
WIRE-BOARD CONN RECEPTACLE, 6POS, 3.96MM
Manufacturer:
TE Connectivity
Datasheet:
Part Number:
Description:
ADAPTER 20 PIN .420" PLUGS(6PCS)
Manufacturer:
Logical Systems Inc.
Datasheet:
Part Number:
Description:
CONN BARRIER BLOCK .438" 20 POS
Manufacturer:
Cinch Connectors
Datasheet:
Part Number:
Description:
20 MODII 2PC HDR DR SHRD, ROHS
Manufacturer:
TE Connectivity
Datasheet:
Part Number:
Description:
WIRE-BOARD CONN RECEPTACLE, 6POS, 3.96MM
Manufacturer:
TE Connectivity
Datasheet: