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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)： | 26/103頁 |
| 文件大?。?/td> | 1185K |
| 代理商： | PSD813F3V |
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PSD81XFX, PSD83XF2, PSD85XF2
26/103
SRAM
The SRAM is enabled when SRAM Select (RS0)
from the DPLD is High. SRAM Select (RS0) can
contain up to two product terms, allowing flexible
memory mapping.
The SRAM can be backed up using an external
battery. The external battery should be connected
to Voltage Stand-by (V
STBY
, PC2). If you have an
external battery connected to the PSD8XXFX, the
contents of the SRAM are retained in the event of
a power loss. The contents of the SRAM are re-
tained so long as the battery voltage remains at
2 V or greater. If the supply voltage falls below the
battery voltage, an internal power switch-over to
the battery occurs.
PC4 can be configured as an output that indicates
when power is being drawn from the external bat-
tery. Battery-on Indicator (VBATON, PC4) is High
with the supply voltage falls below the battery volt-
age and the battery on Voltage Stand-by (V
STBY
,
PC2) is supplying power to the internal SRAM.
SRAM Select (RS0), Voltage Stand-by (V
STBY
,
PC2) and Battery-on Indicator (VBATON, PC4)
are all configured using PSDsoft Express Configu-
ration.
Sector Select and SRAM Select
Sector Select (FS0-FS7, CSBOOT0-CSBOOT3)
and SRAM Select (RS0) are all outputs of the
DPLD. They are setup by writing equations for
them in PSDabel. The following rules apply to the
equations for these signals:
1. Primary Flash memory and secondary Flash
memory Sector Select signals must not
be
larger than the physical sector size.
2. Any primary Flash memory sector must not
be
mapped in the same memory space as another
Flash memory sector.
3. A secondary Flash memory sector must not
be
mapped in the same memory space as another
secondary Flash memory sector.
4. SRAM, I/O, and Peripheral I/O spaces must not
overlap.
5. A secondary Flash memory sector may
overlap
a primary Flash memory sector. In case of
overlap, priority is given to the secondary Flash
memory sector.
6. SRAM, I/O, and Peripheral I/O spaces may
overlap any other memory sector. Priority is
given to the SRAM, I/O, or Peripheral I/O.
Example.
FS0 is valid when the address is in the
range of 8000h to BFFFh, CSBOOT0 is valid from
8000h to 9FFFh, and RS0 is valid from 8000h to
87FFh. Any address in the range of RS0 always
accesses the SRAM. Any address in the range of
CSBOOT0 greater than 87FFh (and less than
9FFFh) automatically addresses secondary Flash
memory segment 0. Any address greater than
9FFFh accesses the primary Flash memory seg-
ment 0. You can see that half of the primary Flash
memory segment 0 and one-fourth of secondary
Flash memory segment 0 cannot be accessed in
this example. Also note that an equation that de-
fined FS1 to anywhere in the range of 8000h to
BFFFh would not
be valid.
Figure 7 shows the priority levels for all memory
components. Any component on a higher level can
overlap and has priority over any component on a
lower level. Components on the same level must
not
overlap. Level one has the highest priority and
level 3 has the lowest.
Figure 7. Priority Level of Memory and I/O
Components
Level 1
SRAM, I/O, or
Peripheral I/O
Level 2
Secondary
Non-Volatile Memory
Highest Priority
Lowest Priority
Level 3
Primary Flash Memory
AI02867D
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 |
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