- 您现在的位置：买卖IC网 > PDF目录376275 > PSD9134V15JT (意法半导体) Flash In-System Programmable ISP Peripherals For 8-bit MCUs PDF资料下载
参数资料
| 型号： | PSD9134V15JT |
| 厂商： | 意法半导体 |
| 英文描述： | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| 中文描述： | Flash在系统可编程ISP的外设的8位微控制器 |
| 文件页数： | 62/110页 |
| 文件大小： | 1737K |
| 代理商： | PSD9134V15JT |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页当前第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页
PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
62/110
POWER MANAGEMENT
All PSD devices offer configurable power saving
options. These options may be used individually or
in combinations, as follows:
All memory blocks in a PSD (primary and
secondary Flash memory, and SRAM) are
built with power management technology. In
addition to using special silicon design
methodology, power management technology
puts the memories into standby mode when
address/data inputs are not changing (zero
DC current). As soon as a transition occurs on
an input, the affected memory “wakes up”,
changes and latches its outputs, then goes
back to standby. The designer does
not
have
to do anything special to achieve memory
standby mode when no inputs are changing—
it happens automatically.
The PLD sections can also achieve Stand-by
mode when its inputs are not changing, as
described in the sections on the Power
Management Mode Registers (PMMR).
As with the Power Management mode, the
Automatic Power Down (APD) block allows
the PSD to reduce to stand-by current
automatically. The APD Unit can also block
MCU address/data signals from reaching the
memories and PLDs. This feature is available
on all the devices of the PSD family. The APD
Unit is described in more detail in the sections
entitled
Automatic Power-down (APD) Unit
and Power-down Mode, page 63
.
Built in logic monitors the Address Strobe of the
MCU for activity. If there is no activity for a
certain time period (MCU is asleep), the APD
Unit initiates Power-down mode (if enabled).
Once in Power-down mode, all address/data
signals are blocked from reaching PSD memory
and PLDs, and the memories are deselected
internally. This allows the memory and PLDs to
■
■
remain in standby mode even if the address/
data signals are changing state externally
(noise, other devices on the MCU bus, etc.).
Keep in mind that any unblocked PLD input
signals that are changing states keeps the PLD
out of Stand-by mode, but not the memories.
PSD Chip Select Input (CSI, PD2) can be
used to disable the internal memories, placing
them in standby mode even if inputs are
changing. This feature does not block any
internal signals or disable the PLDs. This is a
good alternative to using the APD Unit. There
is a slight penalty in memory access time
when PSD Chip Select Input (CSI, PD2)
makes its initial transition from deselected to
selected.
The PMMRs can be written by the MCU at run-
time to manage power. All PSD supports
“blocking bits” in these registers that are set to
block designated signals from reaching both
PLDs. Current consumption of the PLDs is
directly related to the composite frequency of
the changes on their inputs (see Figure
35
and
Figure 36., page 72
). Significant power
savings can be achieved by blocking signals
that are not used in DPLD or CPLD logic
equations.
PSD devices have a Turbo Bit in PMMR0. This
bit can be set to turn the Turbo mode off (the
default is with Turbo mode turned on). While
Turbo mode is off, the PLDs can achieve
standby current when no PLD inputs are
changing (zero DC current). Even when inputs
do change, significant power can be saved at
lower frequencies (AC current), compared to
when Turbo mode is on. When the Turbo mode
is on, there is a significant DC current
component and the AC component is higher.
■
■
相关PDF资料 |
PDF描述 |
|---|---|
| PSD9134V15MT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V20MT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V70MT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V90MIT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9135V15JIT | Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PSD9134V15MIT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V15MT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V20JIT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V20JT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
| PSD9134V20MIT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Flash In-System Programmable ISP Peripherals For 8-bit MCUs |
发布紧急采购，3分钟左右您将得到回复。