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| 型號(hào)： | CY8C5386AXI-081 |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | 外設(shè)及接口 |
| 英文描述： | MULTIFUNCTION PERIPHERAL, PQFP100 |
| 封裝： | 14 X 14 MM, 1.40 MM HEIGHT, ROHS COMPLAINT, MS-026, TQFP-100 |
| 文件頁(yè)數(shù)： | 55/102頁(yè) |
| 文件大?。?/td> | 2374K |
| 代理商： | CY8C5386AXI-081 |
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PRELIMINARY
PSoC 5: CY8C53 Family Datasheet
Document Number: 001-55035 Rev. *G
Page 56 of 102
8.11 Sample and Hold
The main application for a sample and hold, is to hold a value
stable while an ADC is performing a conversion. Some
applications require multiple signals to be sampled
simultaneously, such as for power calculations (V and I).
Figure 8-12. Sample and Hold Topology
(
1 and 2 are opposite phases of a clock)
8.11.1 Down Mixer
The S+H can be used as a mixer to down convert an input signal.
This circuit is a high bandwidth passive sample network that can
sample input signals up to 14 MHz. This sampled value is then
held using the opamp with a maximum clock rate of 4 MHz. The
output frequency is at the difference between the input frequency
and the highest integer multiple of the Local Oscillator that is less
than the input.
8.11.2 First Order Modulator - SC Mode
A first order modulator is constructed by placing the switched
capacitor block in an integrator mode and using a comparator to
provide a 1-bit feedback to the input. Depending on this bit, a
reference voltage is either subtracted or added to the input
signal. The block output is the output of the comparator and not
the integrator in the modulator case. The signal is downshifted
and buffered and then processed by a decimator to make a
delta-sigma converter or a counter to make an incremental
converter. The accuracy of the sampled data from the first-order
modulator is determined from several factors.
The main application for this modulator is for a low frequency
ADC with high accuracy. Applications include strain gauges,
thermocouples, precision voltage, and current measurement
9. Programming, Debug Interfaces,
Resources
The Cortex-M3 has internal debugging components, tightly
integrated with the CPU, providing the following features:
JTAG or SWD access
Flash Patch and Breakpoint (FPB) block for implementing
breakpoints and code patches
Data Watchpoint and Trigger (DWT) block for implementing
watchpoints, trigger resources, and system profiling
Embedded Trace Macrocell (ETM) for instruction trace
Instrumentation Trace Macrocell (ITM) for support of printf-style
debugging
PSoC devices include extensive support for programming,
testing, debugging, and tracing both hardware and firmware.
Four interfaces are available: JTAG, SWD, SWV, and
TRACEPORT. JTAG and SWD support all programming and
debug features of the device. JTAG also supports standard JTAG
scan chains for board level test and chaining multiple JTAG
devices for programming or testing. The SWV and TRACEPORT
provide trace output from the DWT, ETM, and ITM.
TRACEPORT is faster but uses more pins. SWV is slower but
uses only one pin.
Cortex-M3 debug and trace functionality enables full device
debugging in the final system using the standard production
device. It does not require special interfaces, debugging pods,
simulators, or emulators. Only the standard programming
connections are required to fully support debug.
The PSoC Creator IDE software provides fully integrated
programming and debug support for PSoC devices. The low cost
MiniProg3 programmer and debugger is designed to provide full
programming and debug support of PSoC devices in conjunction
with the PSoC Creator IDE. PSoC JTAG, SWD, and SWV
interfaces are fully compatible with industry standard third party
tools.
All Cortex-M3 debug and trace modules are disabled by default
and can only be enabled in firmware. If not enabled, the only way
to reenable them is to erase the entire device, clear flash
protection, and reprogram the device with new firmware that
enables them. Disabling debug and trace features, robust flash
protection, and hiding custom analog and digital functionality
inside the PSoC device provide a level of security not possible
with multichip application solutions. Additionally, all device
interfaces can be permanently disabled (Device Security) for
applications concerned about phishing attacks due to a
maliciously reprogrammed device. Permanently disabling
interfaces is not recommended in most applications because the
designer then cannot access the device. Because all
programming, debug, and test interfaces are disabled when
Device Security is enabled, PSoCs with Device Security enabled
may not be returned for failure analysis.
V i
n
V ref
V out
1
2
C
1
C
2
1
2
1
2
1
2
C3
C4
Vref
V ref
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| CY8C5466AXI-064 | 功能描述:可編程片上系統(tǒng) - PSoC PSoC 5 RoHS:否 制造商:Cypress Semiconductor 核心:8051 處理器系列:CY8C36 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:67 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:4 KB 片上 ADC:Yes 工作電源電壓:0.5 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:QFN-68 安裝風(fēng)格:SMD/SMT |
| CY8C5466AXI-064T | 功能描述:可編程片上系統(tǒng) - PSoC 64Kb Flash 16Kb SRAM PSoC 5 RoHS:否 制造商:Cypress Semiconductor 核心:8051 處理器系列:CY8C36 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:67 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:4 KB 片上 ADC:Yes 工作電源電壓:0.5 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:QFN-68 安裝風(fēng)格:SMD/SMT |
| CY8C5466LTI-063 | 功能描述:可編程片上系統(tǒng) - PSoC PSoC 5 RoHS:否 制造商:Cypress Semiconductor 核心:8051 處理器系列:CY8C36 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:67 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:4 KB 片上 ADC:Yes 工作電源電壓:0.5 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:QFN-68 安裝風(fēng)格:SMD/SMT |
| CY8C5466LTI-063T | 功能描述:可編程片上系統(tǒng) - PSoC 64Kb Flash 16Kb SRAM PSoC 5 RoHS:否 制造商:Cypress Semiconductor 核心:8051 處理器系列:CY8C36 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:67 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:4 KB 片上 ADC:Yes 工作電源電壓:0.5 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:QFN-68 安裝風(fēng)格:SMD/SMT |
| CY8C5467AXI-011 | 功能描述:可編程片上系統(tǒng) - PSoC PSoC 5 RoHS:否 制造商:Cypress Semiconductor 核心:8051 處理器系列:CY8C36 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:67 MHz 程序存儲(chǔ)器大小:32 KB 數(shù)據(jù) RAM 大小:4 KB 片上 ADC:Yes 工作電源電壓:0.5 V to 5.5 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:QFN-68 安裝風(fēng)格:SMD/SMT |
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