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PSD4235G2V-10UI датащи(PDF) 29 Page - STMicroelectronics

номер детали PSD4235G2V-10UI
подробное описание детали  Flash In-System Programmable (ISP) Peripherals for 16-bit MCUs
PDF  100 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD4235G2V-10UI датащи(HTML) 29 Page - STMicroelectronics

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PSD4256G6V
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
Reading the Erase/Program Status Bits
The PSD provides several status bits to be used
by the MCU to confirm the completion of an Erase
or Program cycle of Flash memory. These status
bits minimize the time that the MCU spends per-
forming these tasks and are defined in Table 30.
The status byte resides in an even location, and
can be read as many times as needed. Also note
that DQ15-DQ8 is an even byte for Motorola
MCUs with a 16-bit data bus.
For Flash memory, the MCU can perform a READ
operation to obtain these status bits while an
Erase or Program instruction is being executed by
the embedded algorithm. See the section entitled
“PROGRAMMING FLASH MEMORY”, on page
31, for details.
Table 30. Status Bits
Table 31. Status Bits for Motorola 16-bit MCU
Notes:X = Not guaranteed value, can be read either ’1’ or ’0.’
DQ15-DQ0 represent the Data Bus bits, D15-D0.
FS0-FS15/CSBOOT0-CSBOOT3 are active High.
DQ7
DQ6
DQ5
DQ4
DQ3
DQ2
DQ1
DQ0
Data Polling
Toggle Flag
Error Flag
X
Erase Time-
out
XXX
DQ15
DQ14
DQ13
DQ12
DQ11
DQ10
DQ9
DQ8
Data Polling
Toggle Flag
Error Flag
X
Erase Time-
out
XXX



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