UM0244 datasheet(4/11 Pages) STMICROELECTRONICS

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Pin definition on FlashLINK adaptor

UM0244

4/11

Pin definition on FlashLINK adaptor

Note:

OC = Open Collector, pulled-up to VCC inside FlashLINK Adaptor.

Not supported by CAPS, signals remain inactive.

All signal grounds are tied together inside FlashLINK Adaptor.

The target must supply VCC to the FlashLINK Adaptor (2.7V to 5.5VDC, 15mA max at 5.5V).

Not all 14 signals are required for all applications. Here is how they are used:

●

(8) Core signals that must be connected: TDI, TDO, TMS, TCK, TRST, RST, VCC, GND

●

(1) Optional signal to pace TCK: TSTAT/JRTCK

●

(2) Optional generic control signals to target system from FlashLINK: JEN, CNTL

●

(1) Optional generic data out signal from target system to FlashLINK: TERR

●

(2) Two additional ground lines to help reduce EMI if a ribbon cable is used. These

ground lines “sandwich” the TCK signal in the ribbon cable. These two ground signals

are not present on the flying lead cable.

Table 1.

Pin Description for 14-pin FlashLINK Adaptor Connector

Pin #

Signal Name

Description

Type(1)

FlashLINK is

Signal:

1JEN(2)

Generic Control Signal

Source

2TRST

JTAG IEEE 1149.1 Reset on target, active-low -

JTRST

Source

3GND(3)

Signal Ground

CNTL(2)

Generic Control Signal

Source

TDI

JTAG IEEE 1149.1 Serial Data Input - JTDI

Source

TSTAT/JRTCK JTAG-ISP to pace JTCK clock signal - JRTCK

Destination

7VCC

(4)

DC source from target, 2.7V to 5.5V

8RST

Target system reset, active-low

Source

TMS

JTAG IEEE 1149.1 Mode Select - JTMS

Source

GND

Signal Ground

TCK

JTAG IEEE 1149.1 Clock - JTCK

Source

GND

Signal Ground

TDO

JTAG IEEE 1149.1 Serial Data Out - JTDO

Destination

TERR(2)

Generic Data Out Signal

Destination

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