Microchip MPFS460TLS handleiding
Handleiding
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FlashPro Express User Guide
51
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.
FlashPro4
The FlashPro4 output is supplied via a connector to which a detachable 10-pin cable is fitted. The connector on
the FlashPro4 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 FlashPro4 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 FlashPro4 10-pin connector are shown in the figure below (extracted from
FlashPro4 product specification):
Figure 27 · FlashPro4 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 6 · FlashPro4 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
PROG_MODE IGLOO v2 family - Used for switching from VCC 1.2V to 1.5V during programming
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Productinformatie
| Merk | Microchip |
| Model | MPFS460TLS |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 10235 MB |
