Analog Devices ADSP-BF538F system manual Uart Port, Expansion Interface

System Architecture

UART Port

The universal asynchronous receiver/transmitter (UART) port of the pro- cessor connects to the ADM3202 RS-232 line driver as well as to the expansion interface. The RS-232 line driver connects to the DB9 female connector, providing an interface to a PC and other serial devices.

Expansion Interface

The expansion interface consists of three 90-pin connectors. Table 2-2shows the interfaces each connector provides. For the exact pinout of the connectors, refer to “ADSP-BF538FEZ-KIT Lite Schematic” on

page B-1. The mechanical dimensions of the connectors can be obtained from Technical or Customer Support.

Analog Devices offers many EZ-Extender products that plug on to the expansion interface. For more information on these products, visit the Analog Devices Web site at www.analog.com.

Table 2-2. Expansion Interface Connectors

Connector	Interfaces
J1	5V, GND, address, data, PPI
J2	3.3V, GND, SPI, NMI, TMR2–0, SPORT0, SPORT1, PF15–0, EBUI control signals
J3	5V, 3.3V, GND, UART, flash IO, reset, audio control signals

Limits to the current and to the interface speed must be taken into consid- eration when using the expansion interface. The maximum current limit is dependent on the capabilities of the used regulator. Additional circuitry also can add extra loading to signals, decreasing their maximum effective speed.

Analog Devices does not support and is not responsible for the effects of additional circuitry.

2-8 ADSP-BF538F EZ-KIT Lite Evaluation System Manual