- 您現(xiàn)在的位置：買賣IC網 > PDF目錄370021 > PSD813F3V 60V 100kRad Hi-Rel Single P-Channel TID Hardened MOSFET in a UB Surface Mount package; Similar to IRHLUB7970Z4 with optional Total Dose Rating of 300kRads PDF資料下載
參數(shù)資料
| 型號： | PSD813F3V |
| 英文描述： | 60V 100kRad Hi-Rel Single P-Channel TID Hardened MOSFET in a UB Surface Mount package; Similar to IRHLUB7970Z4 with optional Total Dose Rating of 300kRads |
| 中文描述： | Flash在系統(tǒng)編程（ISP）外設的8位微控制器 |
| 文件頁數(shù)： | 22/103頁 |
| 文件大?。?/td> | 1185K |
| 代理商： | PSD813F3V |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁當前第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁
PSD81XFX, PSD83XF2, PSD85XF2
22/103
Programming Flash Memory
Flash memory must be erased prior to being pro-
grammed. A byte of Flash memory is erased to all
1s (FFh), and is programmed by setting selected
bits to 0. The MCU may erase Flash memory all at
once or by-sector, but not byte-by-byte. However,
the MCU may program Flash memory byte-by-
byte.
The primary and secondary Flash memories re-
quire the MCU to send an instruction to program a
byte or to erase sectors (see Table 8).
Once the MCU issues a Flash memory Program or
Erase instruction, it must check for the status bits
for completion. The embedded algorithms that are
invoked inside the PSD8XXFX support several
means to provide status to the MCU. Status may
be checked using any of three methods: Data Poll-
ing, Data Toggle, or Ready/Busy (PC3).
Data Polling.
Polling on the Data Polling Flag
(DQ7) bit is a method of checking whether a Pro-
gram or Erase cycle is in progress or has complet-
ed. Figure 5 shows the Data Polling algorithm.
When the MCU issues a Program instruction, the
embedded algorithm within the PSD8XXFX be-
gins. The MCU then reads the location of the byte
to be programmed in Flash memory to check sta-
tus. The Data Polling Flag (DQ7) bit of this location
becomes the complement of b7 of the original data
byte to be programmed. The MCU continues to
poll this location, comparing the Data Polling Flag
(DQ7) bit and monitoring the Error Flag (DQ5) bit.
When the Data Polling Flag (DQ7) bit matches b7
of the original data, and the Error Flag (DQ5) bit
remains 0, the embedded algorithm is complete. If
the Error Flag (DQ5) bit is 1, the MCU should test
the Data Polling Flag (DQ7) bit again since the
Data Polling Flag (DQ7) bit may have changed si-
multaneously with the Error Flag (DQ5) bit (see
Figure 5).
The Error Flag (DQ5) bit is set if either an internal
time-out occurred while the embedded algorithm
attempted to program the byte or if the MCU at-
tempted to program a 1 to a bit that was not erased
(not erased is logic 0).
It is suggested (as with all Flash memories) to read
the location again after the embedded program-
ming algorithm has completed, to compare the
byte that was written to the Flash memory with the
byte that was intended to be written.
When using the Data Polling method during an
Erase cycle, Figure 5 still applies. However, the
Data Polling Flag (DQ7) bit is 0 until the Erase cy-
cle is complete. A 1 on the Error Flag (DQ5) bit in-
dicates a time-out condition on the Erase cycle; a
0 indicates no error. The MCU can read any loca-
tion within the sector being erased to get the Data
Polling Flag (DQ7) bit and the Error Flag (DQ5) bit.
PSDsoft Express generates ANSI C code func-
tions which implement these Data Polling algo-
rithms.
Figure 5. Data Polling Flowchart
READ DQ5 & DQ7
at VALID ADDRESS
START
READ DQ7
FAIL
PASS
AI01369B
D=
DATA
YES
NO
YES
NO
DQ5
= 1
D=
DATA
YES
NO
相關PDF資料 |
PDF描述 |
|---|---|
| PSD813F4V | -200V 100kRad Hi-Rel Single P-Channel TID Hardened MOSFET in a SMD-2 package; A IRHNA597260 with Standard Packaging |
| PSD813F5V | -60V 100kRad Hi-Rel Single P-Channel TID Hardened MOSFET in a SMD-2 package; Similar to IRHNA9064 with optional Total Dose Rating of 300kRads |
| PSD86 | THREE PHASE RECTIFIER BRIDGE |
| PSF101 | WORLD MAGNETICS ULTRA SENSITIVEPRESSURESWITCHES |
| PSG61 | 4 KEY BI-BI CALL |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| PSD813F3V-12 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash In-System Programmable (ISP) Peripherals for 8-bit MCUs, 5V |
| PSD813F3V-12J | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD813F3V-12JI | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD813F3V-12JIT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD813F3V-12JT | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
發(fā)布緊急采購，3分鐘左右您將得到回復。