參數(shù)資料
型號(hào)： PSD8135V12JT
廠(chǎng)商： 意法半導(dǎo)體
英文描述： Flash In-System Programmable ISP Peripherals For 8-bit MCUs
中文描述： Flash在系統(tǒng)可編程ISP的外設(shè)的8位微控制器
文件頁(yè)數(shù)： 18/110頁(yè)
文件大?。?/td> 1685K
代理商： PSD8135V12JT
PSD813F1
18/110
DETAILED OPERATION
As shown in
Figure 5., page 13
, the PSD consists
of six major types of functional blocks:
Memory Blocks
PLD Blocks
MCU Bus Interface
I/O Ports
Power Management Unit (PMU)
JTAG Interface
The functions of each block are described in the
following sections. Many of the blocks perform
multiple functions, and are user configurable.
MEMORY BLOCKS
The PSD has the following memory blocks (see
Table
7
):
–
The Main Flash memory
–
Secondary EEPROM memory
–
SRAM
The Memory Select signals for these blocks origi-
nate from the Decode PLD (DPLD) and are user-
defined in PSDsoft Express.
Primary Flash Memory and Secondary
EEPROM Description
The 1Mb primary Flash memory is divided evenly
into eight 16-KByte sectors. The EEPROM memo-
ry is divided into four sectors of eight KBytes each.
Each sector of either memory can be separately
protected from Program and Erase operations.
Flash memory may be erased on a sector-by-sec-
tor basis and programmed byte-by-byte. Flash
sector erasure may be suspended while data is
read from other sectors of memory and then re-
sumed after reading.
EEPROM may be programmed byte-by-byte or
sector-by-sector, and erasing is automatic and
I
I
I
I
I
I
transparent. The integrity of the data can be se-
cured with the help of Software Data Protection
(SDP). Any write operation to the EEPROM is in-
hibited during the first five milliseconds following
power-up.
During a program or erase of Flash, or during a
write of the EEPROM, the status can be output on
the Ready/Busy (PC3) pin of Port C3. This pin is
set up using PSDsoft Express Configuration.
Memory Block Select Signals.
The
PLD in the PSD generates the chip selects for all
the internal memory blocks (refer to the section
entitled
PLD
’
S, page 34
). Each of the eight Flash
memory sectors have a Flash Select signal (FS0-
FS7) which can contain up to three product terms.
Each of the four EEPROM memory sectors have a
Select signal (EES0-3 or CSBOOT0-3) which can
contain up to three product terms. Having three
product terms for each sector select signal allows
a given sector to be mapped in different areas of
system memory. When using a microcontroller
with separate Program and Data space, these
flexible select signals allow dynamic re-mapping of
sectors from one space to the other.
Ready/Busy Pin (PC3).
Pin PC3 can be used to
output the Ready/Busy status of the PSD. The out-
put on the pin will be a
‘
0
’
(Busy) when Flash or
EEPROM memory blocks are being written to, or
when the Flash memory block is being erased.
The output will be a
‘
1
’
(Ready) when no write or
erase operation is in progress.
decode
Table 7. Memory Blocks
Device
Main Flash
EEPROM
SRAM
PSD813F1
128KB
32KB
2KB
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PSD8135V12MIT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD8135V12MT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD8135V15JIT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD8135V15JT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs
PSD8135V15MIT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs
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