ARM ARM DUI 0224I manual RealView Logic Tile I/O, Figure F-4 RealView Logic Tile tristate for I/O

Models: ARM DUI 0224I

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RealView Logic Tile

Caution

The RealView Logic Tile mounted on the PB926EJ-S must use the default 3.3V signal levels.

F.3.3 RealView Logic Tile I/O

The signals from the UART0, UART1, UART2, SSP, and SCI connectors to the ARM926EJ-S PXP Development Chip can be isolated by pulling the nDRVINENx signals HIGH. This enables logic in the RealView Logic Tile to safely drive the Development Chip signals without contention with external devices on the connectors (see Figure F-4).

Logic Tile connectors

 

UART0

UART0

 

UART1

 

UART1

 

 

 

 

nDRVINEN0

Chip

SSP

SSP

SCI0

SCI0

Dev.

UART2

UART2

 

 

nDRVINEN1

-S

 

 

 

ARM926EJ

GPIO

GPIO

 

UART0

I/O connectors

 

UART1

 

 

 

 

SSP

 

 

SCI0

 

 

UART2

 

Figure F-4 RealView Logic Tile tristate for I/O

F-6

Copyright © 2003-2010 ARM Limited. All rights reserved.

ARM DUI 0224I

Page 376
Image 376
ARM ARM DUI 0224I manual RealView Logic Tile I/O, Figure F-4 RealView Logic Tile tristate for I/O