668-0010 Rabbit Semiconductor, 668-0010 Datasheet - Page 254
668-0010
Manufacturer Part Number
668-0010
Description
IC MPU RABIT3000 55.5MHZ 128LQFP
Manufacturer
Rabbit Semiconductor
Datasheet
1.20-668-0011.pdf
(312 pages)
Specifications of 668-0010
Rohs Status
RoHS non-compliant
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
Features
-
Other names
316-1016
- Current page: 254 of 312
- Download datasheet (2Mb)
The access time is given by
Similarly, the gross output-enable access time is T + minimum clock low time (it is
assumed that the early output enable option is enabled). This is reduced by the spectrum
spreader loss, the time from clock to output for the output enable signal, the data setup
time, and a correction for the asymmetry of the original oscillator clock.
Example Output-Enable Access Time Calculation
• clock = 29.49 MHz, so T = 34 ns
• operating voltage is 3.3 V
• the clock doubler has a nominal delay of 16 ns (see Table 27-8), resulting in a minimum
• clock to output enable is 5 ns (assuming 20 pF load)
• spectrum spreader is on in normal mode, resulting in a loss of 3 ns worst-case (see
• main clock asymmetry is 52% / 48%, resulting in a loss of 4% of the clock period, or
The output enable access time is given by
244
clock low time of 80% × 16 ns = 12.8 ns
Table 27-9)
1.4 ns
NOTE: There is some process and temperature variation in the clock doubler settings. As
a rule of thumb, a 20% variation should be considered. When the doubler is enabled,
80% of the nominal value should be used for the memory access time calculation.
access time
access time
= 2T - (clock to address) - (data setup) - (spreader delay)
= 68 ns - 8 ns - 1 ns - 3 ns
= 56 ns
= T + (min. clock low) - (clock to output enable) -
= 34 ns + 12.8 ns - 5 ns - 3 ns - 1.4 ns - 1 ns
= 36 ns
(spreader delay) - (asymmetry delay) - (data setup time)
Rabbit 3000 Microprocessor User’s Manual
Related parts for 668-0010
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Microprocessors - MPU 30MHz PROCESSOR 100PQFP IQ2T VERS.
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
IC CPU RABBIT2000 30MHZ 100PQFP
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
IC MPU RABIT3000A 55.5MHZ128LQFP
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
Microprocessors - MPU Rabbit 3000 TFBGA 55.5 MHz Clock Speed
Manufacturer:
Rabbit Semiconductor
Part Number:
Description:
Microprocessors - MPU Rabbit 3000 TFBGA Microprocessor
Manufacturer:
Rabbit Semiconductor
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:
IC MPU RABIT3000A 55.5MHZ128LQFP
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
MODULE RABBITCORE RCM4010
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
RCM4110 RABBITCORE
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
MODULE RABBITCORE RCM2000
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
MODULE RABBITCORE RCM3000
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
MCU RCM4000 RABBITCORE
Manufacturer:
Rabbit Semiconductor
Datasheet:
Part Number:
Description:
MODULE RCM4210 RABBITCORE
Manufacturer:
Rabbit Semiconductor
Datasheet: