ADSP-BF531SBBC400 Analog Devices Inc, ADSP-BF531SBBC400 Datasheet - Page 44

• 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

ADSP-BF531/BF532/BF533
76.
77.
78.
DESCRIPTION:
When the PPI port is configured in transmit mode with two internal frame syncs, the PPI will not start properly if the PPI Frame Sync 3
(PPI_FS3) pin is left floating.
WORKAROUND:
The PPI_FS3 pin must be pulled down when the PPI is configured in transmit mode with 2 internal frame syncs.
APPLIES TO REVISION(S):
0.5
DESCRIPTION:
Executing an SSYNC instruction from non-cacheable L2 memory with interrupts disabled can cause the processor to stall.
WORKAROUND:
If any interrupts are enabled, the stall will still occur, but it will be broken by the asynchronous event. If no interrupts are enabled or no
interrupts are being generated, the stall is indefinite and the processor must be reset.
To avoid the stall condition, the following conditions must be met.
1) The SSYNC is in L1 memory or in cacheable L2 memory.
2) The SSYNC is not at a loop bottom where the loop top is located in non-cacheable L2 memory.
3) If the SSYNC is located in a cacheable L2 page, it is at least eight 64-bit words away from the bottom of the page (as specified by a
CPLB) if the following (address sequential) page is either L1 or non-cacheable L2 memory.
If any of the above conditions is not met, another workaround would be to configure one of the timers prior to the SSYNC instruction with
a time-out period to generate an interrupt and break the stall.
APPLIES TO REVISION(S):
0.5
DESCRIPTION:
When level-sensitive GPIO events are used to wake the processor from the low-power sleep mode of operation, the processor may stall
indefinitely if the width of the wakeup pulse is too short. When this occurs, the PLL begins transitioning from the sleep mode due to the
level sensed on the GPIO pin, but then reverts back to the sleep mode if the trigger level is removed before the core has had sufficient
time to break the idle state to resume execution.
As a result, the processor does not wake up properly, at which point only a hardware reset can exit the resulting stall condition.
WORKAROUND:
There are two ways to avoid this anomaly:
1) Use edge-sensitivity for the pin(s) being used to generate the wakeup event.
2) Ensure that the edge on the wakeup signal is clean and held at the trigger level for at least 3 system clock (SCLK) cycles.
APPLIES TO REVISION(S):
0.3, 0.4, 0.5, 0.6
05000400 - PPI Does Not Start Properly In Specific Mode:
05000402 - SSYNC Stalls Processor when Executed from Non-Cacheable Memory:
05000403 - Level-Sensitive External GPIO Wakeups May Cause Indefinite Stall:
NR003532D | Page 44 of 45 | July 2008
Silicon Anomaly List