参数资料
型号: 844USB
厂商: B&K Precision
文件页数: 135/141页
文件大小: 0K
描述: DEVICE PROGRAMMER USB INTERFACE
标准包装: 1
类型: 通用
适用于相关产品: EPROM、EEPROM 闪存、串行 EPROM、微控制器和 PLD
所含物品: 编程器、适配器、缆线、手册和软件
The recommendation for design of target system with ISP
programmed device
The target system must be designed to allow all signals, which are use for In-system
programming to be directly connected to ISP programmer via ISP connector. If target system
use these signals for other function, is necessary isolated these signals. Target system
mustn’t affect these signals during In-system programming.
For in-system programmable devices manufacturers publish application notes. Design of B+K
PRECISION programmers together with respect of these application notes allows proper In-
system programming. Condition is exactly respecting these application notes. Applications
notes,
which
B+K PRECISION
use in
ISP programmers,
are
published in
www.bkprecision.com , section Support / Application Notes .
Please, read some notes for following recommended circuits.
? Purpose of D1 diode is to protect the target circuit against a higher voltage, which is
provided by ISP programmer.
? If your target board supply differs from mentioned 5V, choose please the Zener diode (D1)
voltage according to this supply voltage.
? We recommend to use resistors R1, R2, (R3) to separate the target device from target
system. If pins needed for ISP programming are inputs in target system then separation
by resistors is sufficient and resistors make a low pass filter too. If pins are outputs, then
use of resistors saves a programming time. Of course the isolation resistors R1, R2, (R3)
can be replaced by switches or jumpers, if necessary. In that case, during the ISP
programming of target device the switches (jumpers) must be open. But the using of
switches (jumpers) adds a next manipulation time to programming procedure.
Example of application note
Microcontrollers Atmel AVR and AT89Sxxx series
This interface corresponds with Atmel application note AVR910: In-System Programming.
This application note describes the recommended ISP interface connector layout in target
system (top view).
B+K PRECISION’s recommended circuit for ATMEL AVR:
ISP connector
target device
target system
DATA IN
DATA OUT
SCK
RESET
target VCC check only
VCC
GND
D2
1N4148
R11
100k
GND
C1
22n
VCC
MOSI
MISO
SCK
R1
R2
R3
C2
1u/10V
GND
reset circuit
135
RESET
GND
GND
I1
ATMEL AVR
GND
相关PDF资料
PDF描述
84702-0008 CONN RECEPT ETHERNET 8-8 PNL MNT
848A MEMORY PROGRAMMER PARALLEL INTER
85506-0001 CONN MOD JACK VERT 8-8 HI-SPEED
85507-0001 CONN MOD JACK VERT 8-8 SHIELDED
85508-0001 CONN MOD JACK VERT 8-8 SHIELDED
相关代理商/技术参数
参数描述
845 功能描述:程序设计器 - 基于通用和内存 REORD 615-865 UNIV. WITH SOFTWARE RoHS:否 制造商:Xeltek 产品:Universal Device Programmers 工具用于评估:EPROM, Parallel/Serial EEPROM, FPGA, PROM, Flash, BPROM, MCUs, PLD Devices 接口类型:Parallel, USB 工作电源电压:90 VAC to 250 VAC
845 1 1/2"X15YD 功能描述:SCOTCH BOOK TAPE 845 1-1/2 IN X 制造商:3m 系列:* 零件状态:在售 标准包装:24
845 3"X15YD 功能描述:SCOTCH BOOK TAPE 845 3 IN X 15 Y 制造商:3m 系列:* 零件状态:在售 标准包装:12
845 4"X15YD 功能描述:SCOTCH BOOK TAPE 845 4 IN X 15 Y 制造商:3m 系列:* 零件状态:在售 标准包装:8
845 PRO4 制造商:Micro-Star International 功能描述:845 P4 S478 SDRAM LAN - Bulk