ADSP-BF531SBSTZ400 Analog Devices Inc, ADSP-BF531SBSTZ400 Datasheet - Page 9

• Manufacturer Part Number: ADSP-BF531SBSTZ400
• Description: IC DSP CTLR 16BIT 400MHZ 176LQFP
• Manufacturer: Analog Devices Inc
• Series: Blackfin®r
• Type: Fixed Pointr

Specifications of ADSP-BF531SBSTZ400

• 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: 176-LQFP
• No. Of Bits: 16 Bit
• Frequency: 400MHz
• Supply Voltage: 1.2V
• Embedded Interface Type: PPI, SPI, UART
• No. Of I/o's: 16
• Supply Voltage Range: 0.8V To 1.45V, 1.75V To 3.6V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ADZS-BF533-EZLITE - KIT W/BOARD EVAL FOR ADSP-BF533
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Silicon Anomaly List
11.
12.
DESCRIPTION:
For certain PPI configurations, the general-purpose timers can be utilized as frame sync signals. When the PPI is set up for transmit modes
that utilize one or more external frame syncs, the general-purpose timers will have limited functionality.
WORKAROUND:
The anomaly only applies to the "PPI transmit with 2 external frame syncs" mode, and only the TMR2 pin is affected. Timer 2 must be
enabled and is not available for general use.
APPLIES TO REVISION(S):
0.3
DESCRIPTION:
A false Code or Data Protection Exception may be raised if it is caused by a speculative fetch that is cancelled. For instance, if a jump or an
rts instruction located at the last word of a valid page branches to another valid page, but the speculative instruction fetch was from an
invalid or non-existing memory location, an exception would still be raised. Similarly, if a post-incremented indirect data memory access
performs a speculative access to a protected or non-existing memory location (for instance R0 = [P0++]; where P0 points to the last word
of a page) an incorrect exception would occur.
WORKAROUND:
1) Do not place branch instructions or data at page boundaries. Leave at least 76 bytes free before any boundary with a reserved memory
space. This will prevent false exceptions from occuring.
2) Have the exception handler confirm whether the exception was valid or not before taking action. This can be done by verifying if the
CODE_FAULT_ADDR (or the DATA_FAULT_ADDR) register contains an address that is within a valid page. In that case, no action is
performed.
The default VisualDSP++ LDFs include a workaround for this hardware anomaly. The workaround will be automatically enabled for the
appropriate silicon revisions, or the workaround can be enabled manually by defining the macro
__WORKAROUND_AVOID_LDF_BLOCK_BOUNDARIES when linking.
When enabled, the LDFs will reserve 76 bytes at the boundaries of valid memory blocks.
APPLIES TO REVISION(S):
0.3
05000183 - Timer Pin Limitations for PPI TX Modes with External Frame Syncs:
05000189 - False Protection Exceptions when Speculative Fetch Is Cancelled:
NR003532D | Page 9 of 45 | July 2008
ADSP-BF531/BF532/BF533