- 您现在的位置：买卖IC网 > PDF目录20469 > TOOLSTICK300SPP (Silicon Laboratories Inc)TOOLSTICK PROGRAMMING ADAPTER PDF资料下载
参数资料
| 型号： | TOOLSTICK300SPP |
| 厂商： | Silicon Laboratories Inc |
| 文件页数： | 173/178页 |
| 文件大小： | 0K |
| 描述： | TOOLSTICK PROGRAMMING ADAPTER |
| 标准包装： | 1 |
| 系列： | ToolStick |
| 类型： | 微控制器编程器 |
| 适用于相关产品： | C8051F300 |
| 所含物品： | 2 个板和 USB 连接线缆 |
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页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页当前第173页第174页第175页第176页第177页第178页
C8051F300/1/2/3/4/5
94
Rev. 2.9
10.4. Flash Write and Erase Guidelines
Any system which contains routines which write or erase Flash memory from software involves some risk
that the write or erase routines will execute unintentionally if the CPU is operating outside its specified
operating range of VDD, system clock frequency, or temperature. This accidental execution of Flash modi-
fying code can result in alteration of Flash memory contents causing a system failure that is only recover-
able by re-Flashing the code in the device.
The following guidelines are recommended for any system which contains routines which write or erase
Flash from code.
10.4.1. VDD Maintenance and the VDD monitor
1.
If the system power supply is subject to voltage or current "spikes," add sufficient transient
protection devices to the power supply to ensure that the supply voltages listed in the Absolute
Maximum Ratings table are not exceeded.
2.
Make certain that the minimum VDD rise time specification of 1 ms is met. If the system cannot
meet this rise time specification, then add an external VDD brownout circuit to the RST pin of
the device that holds the device in reset until VDD reaches 2.7 V and re-asserts RST if VDD
drops below 2.7 V.
3.
Enable the on-chip VDD monitor and enable the VDD monitor as a reset source as early in code
as possible. This should be the first set of instructions executed after the Reset Vector. For 'C'-
based systems, this will involve modifying the startup code added by the 'C' compiler. See your
compiler documentation for more details. Make certain that there are no delays in software
between enabling the VDD monitor and enabling the VDD monitor as a reset source. Code
examples showing this can be found in “AN201: Writing to Flash from Firmware", available
from the Silicon Laboratories web site.
4.
As an added precaution, explicitly enable the VDD monitor and enable the VDD monitor as a
reset source inside the functions that write and erase Flash memory. The VDD monitor enable
instructions should be placed just after the instruction to set PSWE to a '1', but before the
Flash write or erase operation instruction.
5.
Make certain that all writes to the RSTSRC (Reset Sources) register use direct assignment
operators and explicitly DO NOT use the bit-wise operators (such as AND or OR). For exam-
ple, "RSTSRC = 0x02" is correct. "RSTSRC |= 0x02" is incorrect.
6.
Make certain that all writes to the RSTSRC register explicitly set the PORSF bit to a '1'. Areas
to check are initialization code which enables other reset sources, such as the Missing Clock
Detector or Comparator, for example, and instructions which force a Software Reset. A global
search on "RSTSRC" can quickly verify this.
10.4.2. PSWE Maintenance
7.
Reduce the number of places in code where the PSWE bit (b0 in PSCTL) is set to a '1'. There
should be exactly one routine in code that sets PSWE to a '1' to write Flash bytes and one rou-
tine in code that sets PSWE and PSEE both to a '1' to erase Flash pages.
8.
Minimize the number of variable accesses while PSWE is set to a '1'. Handle pointer address
updates and loop variable maintenance outside the "PSWE = 1; ... PSWE = 0;" area. Code
examples showing this can be found in AN201, "Writing to Flash from Firmware", available
from the Silicon Laboratories web site.
9.
Disable interrupts prior to setting PSWE to a '1' and leave them disabled until after PSWE has
been reset to '0'. Any interrupts posted during the Flash write or erase operation will be ser-
相关PDF资料 |
PDF描述 |
|---|---|
| 396-070-541-804 | CARD EDGE 70POS DL .125X.250 BLK |
| TOOLSTICK588PP | PLATFORM PROG TOOLSTICK F588 |
| EEM22DRKH-S13 | CONN EDGECARD 44POS .156 EXTEND |
| 396-070-541-802 | CARD EDGE 70POS DL .125X.250 BLK |
| T95Y476K6R3LSAL | CAP TANT 47UF 6.3V 10% 2910 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TOOLSTICK310PP | 功能描述:插座和适配器 C8051F310/12/14 F361 F364 F366 F368 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x |
| TOOLSTICK311DC | 功能描述:子卡和OEM板 ToolStick C8051F311 Daughter Card RoHS:否 制造商:BeagleBoard by CircuitCo 产品:BeagleBone LCD4 Boards 用于:BeagleBone - BB-Bone - Open Source Development Kit |
| TOOLSTICK311PP | 功能描述:插座和适配器 C8051F311/13/15 F362 F365 F367 F369 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x |
| TOOLSTICK316PP | 功能描述:插座和适配器 C8051F316/17 F338 F339 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x |
| TOOLSTICK320PP | 功能描述:插座和适配器 Dev Tool C8051F320 F342 F343 F346 F347 RoHS:否 制造商:Silicon Labs 产品:Adapter 用于:EM35x |
发布紧急采购，3分钟左右您将得到回复。