参数资料
型号: PP-MOD1V2
英文描述: ISP INTERFACE MODULE
中文描述: ISP的接口模块
文件页数: 43/48页
文件大小: 3471K
代理商: PP-MOD1V2
ISP Interface Module Version 1.00 27/06/01
36
9.3 Bed-of-Nails shorting pins detection
9.3.1 Overview
This configuration allows a PPM programming project to be initiated by the contact of the
Target System on a bed of nails test fixture.
9.3.2 Circuit Implementation
To use this configuration LNK 4 must NOT be inserted on the PIM. The Target System is
powered by an external power supply. R1 should be connected to VOUT on J5 on the PIM.
The Target Vcc should be connected to the T_VCC connection on J4 or to ‘Target Vcc’ on J1
or J2.
Figure 55 - Power supplied by an external power supply, auto detection of target using a ‘bed of nails’ test fixture.
Please note:
ZD1 should be a 6.2V Zener diode to protect the PPM Line Driver pins (now fitted as
standard on PIM Iss2 V2)
R1 should be 220 ohms
9.3.3 EQTools Project / Script Implementation
In order for the PPM to automatically detect the connection/disconnection of the Target
System, it is necessary to set up a Programming Project and Script within EQTools as
follows:
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