ADSP-BF531SBBC400 Analog Devices Inc, ADSP-BF531SBBC400 Datasheet - Page 21

• Manufacturer Part Number: ADSP-BF531SBBC400
• Description: IC,MICROPROCESSOR,32-BIT,CMOS,BGA,160PIN,PLASTIC
• Manufacturer: Analog Devices Inc
• Series: Blackfin®r
• Type: Fixed Pointr

Specifications of ADSP-BF531SBBC400

• Rohs Status: RoHS non-compliant
• Interface: SPI, SSP, UART
• Clock Rate: 400MHz
• Non-volatile Memory: ROM (1 kB)
• On-chip Ram: 52kB
• Voltage - I/o: 1.8V, 2.5V, 3.3V
• Voltage - Core: 1.20V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 160-CSPBGA
• Device Core Size: 16b
• Architecture: Modified Harvard
• Format: Fixed Point
• Clock Freq (max): 400MHz
• Mips: 400
• Device Input Clock Speed: 400MHz
• Operating Supply Voltage (typ): 1.2/1.8/2.5/3.3V
• Operating Supply Voltage (min): 0.8/1.75V
• Operating Supply Voltage (max): 1.32/3.6V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 160
• Package Type: CSPBGA
• Package: 160CSP-BGA
• Numeric And Arithmetic Format: Fixed-Point
• Maximum Speed: 400 MHz
• Device Million Instructions Per Second: 400 MIPS
• For Use With: ADZS-BF533-EZLITE - KIT W/BOARD EVAL FOR ADSP-BF533
• Lead Free Status / Rohs Status: Not Compliant

Silicon Anomaly List
37.
38.
39.
DESCRIPTION:
When Data CPLBs are enabled, hardware errors generated as a result of speculative accesses to reserved or undefined memory should not
occur, but they do.
WORKAROUND:
None. Avoid accessing reserved memory as part of a speculative fetch.
The VisualDSP++ Blackfin compiler will ignore uses of its '-cplbs' switch when building for silicon revisions that are impacted by this
anomaly or when the switch '-workaround no-cplb-spec-protect-246' is used. Uses of -cplbs would otherwise allow the compiler to ignore
specualtive fetch issues.
APPLIES TO REVISION(S):
0.3, 0.4
DESCRIPTION:
In multichannel mode, when the period of the frame sync is bigger than the actual data frame width by ONE bit (i.e. there is one "inactive
bit"), the FIRST word of the transmitted frame is shifted to the left by one bit and the LSB is the MSB of the second word. All other words
are transmitted correctly.
All data is transmitted correctly if the Frame Sync period is equal to the actual frame width or bigger by more than 1 bit.
For example, if there are 8 words of 16-bit data each, that would be 128 bits in the data frame.
If RFSDIV = 127 --> all data words are CORRECT
If RFSDIV = 128 --> first word is INCORRECT
If RFSDIV = 129 --> all data words are CORRECT
If RFSDIV = 130 --> all data words are CORRECT
WORKAROUND:
Set the RFSDIV register value to the number of data bits +/- 1 to avoid the case described above.
APPLIES TO REVISION(S):
0.4
DESCRIPTION:
The General-Purpose Timers can generate PWM output waveforms on the TMRx pin whose timing is quantified in either system clock
(SCLK) periods or in periods of an externally supplied clock (TMRCLK or TACLK). For proper operation, SCLK must be faster than the source
that is utilized, TMRCLK or TACLK.
The specification in the data sheet and hardware reference manual allows for TMRCLK and TACLK speeds of up to 1/2 SCLK.
However, the maximum rate is less than this limit. The minimum SCLK/TMRCLK or SCLK/TACLK ratio is somewhere in the range of 2.5 to
2.7. The exact value is not yet characterized.
WORKAROUND:
A minimum SCLK/TMRCLK or SCLK/TACLK ratio of 3 is safe to use.
APPLIES TO REVISION(S):
0.3, 0.4
05000246 - Data CPLBs Should Prevent Spurious Hardware Errors:
05000250 - Incorrect Bit Shift of Data Word in Multichannel (TDM) Mode in Certain Conditions:
05000253 - Maximum External Clock Speed for Timers:
NR003532D | Page 21 of 45 | July 2008
ADSP-BF531/BF532/BF533