NXP Semiconductors TWR-KL25Z Manuel utilisateur

TWR-KL25Z Tower Module

Revision C ERRATA

TWR-KL25Z-ERRATA

Rev. 1.1

TWRKL25Z Tower Module Errata Page 2 of 4

1ERRATA

This document describes errata on the TWR-KL25Z rev. C board as well as their workarounds.

1.1 External jtag usage

1.1.1 Issue description

The usage of level shifters in the communication between the integrated debugger (OpenSDA) and the target MCU

(KL25) is needed because the OpenSDA debugger runs at 3.3 volts while the KL25 can run at 3.3 or 1.8 volts. One of

the level shifters that is used in the circuit is configured for a fixed direction of communication, which means that

when not in use by the OpenSDA, the pin is kept in a fixed state. This fixed state inhibits external debuggers to work

when the OpenSDA is powered (by connecting the mini USB connector).

The problematic signal is highlighted below.

1.1.2 Workaround

To avoid the OpenSDA keeping this signal fixed so that an external debugger can be used, the OpenSDA needs to be

unpowered. There are two available ways to power the board without powering the OpenSDA:

-Power through elevators: use the tower elevators and power the board through them.

-Stand-alone through the micro USB: the TWR-KL25Z includes a micro USB connector that is connected to the

USB port in the KL25 device. The power input from this USB port is connected to the internal KL25 USB

regulator and this regulator output can be routed to power the board by placing to jumpers (J6 and J18) in

TWRKL25Z Tower Module Errata Page 3 of 4

the board.

Care should be taken to avoid connecting the OpenSDA mini USB at the same time, because this may cause

a short circuit!

1.2 Reset button

When the OpenSDA is not powered the reset button does not work. This is because the reset button has

been placed in the OpenSDA side of the level shifter for the reset signal.

To be able to use the reset button, it is needed to power the OpenSDA circuit. This issue does not inhibit

the POR or the external debugger reset.

1.3 Pull-ups missing from the TWRPI connector IIC

1.3.1 Issue description

The IIC signals connected to the TWRPI connector (J4, pins 1 and 2) are missing their pull-ups. These signals

are also connected to the elevator IIC signals (I2C0_SCL and I2C0_SDA) so they are also missing pull-ups if

IIC communication is needed for peripheral boards.

1.3.2 Workaround

Pull-ups can be connected to these signals externally by using the tower elevator lateral connectors. Using

through-hole resistors, connect a 2.2 k to 10 k ohm resistor. Connect between pins 7 and 3 and pins 8 and 3

of the primary elevator top lateral connector as showed in the figure below.

TWRKL25Z Tower Module Errata Page 4 of 4

Freescale™ and the Freescale logo are trademarks of Freescale Semiconductor, Inc.

All other product or service names are the property of their respective owners.

Table des matières

Autres manuels NXP Semiconductors Microcontrôleur

NXP Semiconductors

NXP Semiconductors MTRCKTSPS5744P Manuel utilisateur

NXP Semiconductors

NXP Semiconductors freescale K51 Series Manuel utilisateur

NXP Semiconductors

NXP Semiconductors Harpoon Manuel utilisateur

NXP Semiconductors

NXP Semiconductors AN10815 Instructions d'installation et d'utilisation

NXP Semiconductors

NXP Semiconductors MC9S08QL8 MCU Series Manuel utilisateur

NXP Semiconductors

NXP Semiconductors freescale KV4 Series Manuel utilisateur

NXP Semiconductors

NXP Semiconductors LPC55S0x Mode d’emploi

NXP Semiconductors

NXP Semiconductors S32K324 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors LPC11E Series Manuel utilisateur

NXP Semiconductors

NXP Semiconductors K32W Manuel utilisateur

NXP Semiconductors

NXP Semiconductors LPC546 Series Manuel utilisateur

NXP Semiconductors

NXP Semiconductors freescale semiconductor ColdFire MCF51CN128... Manuel utilisateur

NXP Semiconductors

NXP Semiconductors i.MX31 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors freescale TWR-K60D100M Manuel utilisateur

NXP Semiconductors

NXP Semiconductors AN11844 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors Freescale K22 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors JN5189-DK006 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors S32R27 Mode d’emploi

NXP Semiconductors

NXP Semiconductors LPC800 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors MC9S08PA4 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors Freescale Semiconductor MPC8308 Manuel utilisateur

NXP Semiconductors

NXP Semiconductors EasyEVSE EV Manuel utilisateur

NXP Semiconductors

NXP Semiconductors S32R372141EVB Manuel utilisateur

NXP Semiconductors

NXP Semiconductors ADC1610S Series Manuel utilisateur

Manuels Microcontrôleur populaires d'autres marques

AMS

AMS AS7261 Demo Kit Manuel utilisateur

Novatek

Novatek NT6861 Manuel utilisateur

Espressif Systems

Espressif Systems ESP8266 SDK Guide de configuration

Nuvoton

Nuvoton ISD61S00 ChipCorder Mode d’emploi

STMicrolectronics

STMicrolectronics ST7 Assembler Linker Manuel utilisateur

Texas Instruments

Texas Instruments Chipcon CC2420DK Manuel utilisateur

Lantronix

Lantronix Intrinsyc Open-Q 865XR SOM Manuel utilisateur

NEC

NEC 78GK0S/K 1+ Series Instructions d'installation et d'utilisation

Mikroe

Mikroe SEMITECH N-PLC Click Instructions d'installation et d'utilisation

Intel

Intel Agilex Manuel utilisateur

Cypress

Cypress CY4607 HX2VL Manuel utilisateur

DIGITAL-LOGIC

DIGITAL-LOGIC MICROSPACE Manuel utilisateur

Texas Instruments

Texas Instruments TMS320F2837 D Series Manuel utilisateur

CYPRES

CYPRES CY14NVSRAMKIT-001 Manuel utilisateur

Texas Instruments

Texas Instruments INA-DUAL-2AMP-EVM Manuel utilisateur

Espressif Systems

Espressif Systems ESP8266EX Mode d'emploi

Abov

Abov AC33M8128L Manuel utilisateur

Laird

Laird BL654PA Manuel utilisateur