9.18.2 FlashPro®3

The FlashPro®3 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 FlashPro4/3/3X 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 9-141. 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 9-39. 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.

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.