Microchip MPFS025TLS handleiding
Handleiding
Je bekijkt pagina 53 van 61
FlashPro Express User Guide
52
Some designers of high-integrity boards (military and avionic) may arrange their boards so that TRST is tied to
ground via a weak pull-down resistor. The purpose of this is to hold the JTAG state-machine in a reset state by
default, so that even with TCK oscillating, some sudden ion bombardment or other electrical even will not
suddenly throw the JTAG state-machine into an unknown state. If your design also uses a weak pull-down
resistor on TRST on your board, then enabling the “Drive TRST” flag will be required to force the JTAG state-
machine out of reset to permit programming to take place. With most boards, there is no need to select this flag.
FlashPro3
The FlashPro3 output is supplied via a connector to which a detachable 10-pin cable is fitted. The connector on
the FlashPro3 unit is a 2x5, RA male Header connector, which is manufactured by AMP and has a manufacturer’s
part number of 103310-1. This is a standard 2x5, 0.1 pitch connector which is keyed. Use the 10 pin right-angle
header, AMP P/N 103310-1 (DigiKey P/N A26285-ND) for FlashPro5/4/3/3X and use the 10 pin straight header,
AMP P/N 103308-1 (DigiKey P/N A26267-ND) for the straight version.
The signals on the pins of the FlashPro3 10-pin connector are shown in the figure below (extracted from
FlashPro3 product specification):
Figure 28 · FlashPro3 10-Pin Connector
Note: All ground pins must be connected. The rectangular shape shows connections on the programmer
itself. Arrows show current flow towards or from the rectangular programmer.
The table below shows a description of the signals.
Table 7 · FlashPro3 Signal Description
Signal Description
VPUMP 3.3V Programming voltage
GND Signal reference
TCK JTAG clock
TDI JTAG data input to device
TDO JTAG data output from device
TMS JTAG mode select
nTRST Programmable output pin may be set to off, toggle, low, or high level
VJTAG Reference voltage from the target board
N/C Programmer does not connect to this pin
Bekijk gratis de handleiding van Microchip MPFS025TLS, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Microchip |
| Model | MPFS025TLS |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10235 MB |
