9.18.4 FlashPro®

For FlashPro®, you can use the same 26-pin target cable you used for FlashPro® Lite, but the connections are shown in the figure.

Figure 9-143. 26-pin connections for FlashPro®
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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 the signal pin descriptions for FlashPro.

Table 9-41. FlashPro Signal Description

Signal

Description

VDDP

VDD supply for logic I/O pads

VDDL

VDD supply for core

VPP

Positive programming supply (+16.5 V)

VPN

Negative programming supply (-13.8 V)

GND

Signal reference

SENSE

Input from target board to programmer to indicate connection to ground

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

RCK/OUT0

Programmable output pin may be set to off, toggle, low, or high level

2.5V, 2.5V/3.3V,

N/C

Programmer does not connect to these pins

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.