Program Status Bit (Sr4); Vpp Status Bit (Sr3) - Analog Devices ADSP-BF506F Hardware Reference Manual

Program Status Bit (SR4)

The program status bit identifies a program failure.
When the program status bit is high (set to '1'), the program/erase con-
troller has applied the maximum number of pulses to the byte and still
failed to verify that it has programmed correctly.
The program status bit should be read once the program/erase controller
status bit is high (program/erase controller inactive).
Once set high, the program status bit can only be reset low by a clear sta-
tus register command or a hardware reset. If set high it should be reset
before a new command is issued, otherwise the new command appears to
fail.
V Status Bit (SR3)
PP
The status bit identifies an invalid voltage on the
V
PP
gram and erase operations. The
of a program or erase operation. Indeterminate results can occur if
becomes invalid during an operation.
When the
V
PP
sampled at a valid voltage. When the
pin has a voltage that is below the
V
PP
internal flash memory is protected and program and erase operations can-
not be performed.
Once set high, the
ister command or a hardware reset. If set high it should be reset before a
new program or erase command is issued, otherwise the new command
appears to fail.
ADSP-BF50x Blackfin Processor Hardware Reference
V
status bit is low (set to '0'), the voltage on the
status bit can only be reset low by a clear status reg-
V
PP
Internal Flash Memory
pin is only sampled at the beginning
PP
status bit is high (set to '1'), the
V
PP
lockout voltage,
V
PP
pin during pro-
V
PP
V
PP
pin was
V
PP
, the
VPPLK
6-21