ADSP-21992 EZ-KIT Lite Evaluation System Manual
4-33
All address, data, and control signals are available externally on a connector. The pin-out of the
EMI connector (P3) can be found in the schematics in
4.2.6 SPI Interface
The SPI signals (MISO, MOSI, and SCK) are available on connector P7.
4.2.7 SPI EEPROM
A socket for an 8-pin SPI Serial EEPROM (64K x 8-bit), such as the Microchip 25LC640, is
provided on the ADSP-21992 EZ-KIT Lite board, for booting and/or data storage. The PF1/
SPISEL1 pin of the ADSP-21992 is used to select the SPI Serial EEPROM to be active on the
SPI interface. Jumper JP14 is used to disable the EEPROM when the PF1/ SPISEL1 pin of the
ADSP-21992 is being used as a programmable flag pin.
4.2.8 SPI Digital-to-Analog Converter
An 8-channel, serial, 12-bit DAC (A9) is provided on the ADSP-21992 EZ-KIT Lite board. The
PF2/ SPISEL2 pin of the ADSP-21992 is used to select the DAC (AD5328BRU) to be active on
the SPI interface. PF3 is used to update the DAC registers. Two jumpers, JP15 and JP16, are used
to disable the DACs when the PF2 and PF3 pins are being used as programmable flag pins.
The outputs of the DAC are available at connector P5. Refer to
in section
for the
configuration of P5.
4.2.9 CAN Interface
A CAN transceiver IC (U2) is provided on the SPI Interface. The CAN transceiver IC converts
the input and output to the CAN bus voltages levels. Connectors P12 and P13 provide
connections to the user’s CAN bus and allow easy daisy-chaining of CAN devices. CAN bus
termination of 120
Ω
can be provided by closing jumper JP23.
4.2.10 Serial Port (SPORT) Interface
The SPORT pins are available at the SPORT interface connector, P2. Refer to
section
for the configuration of P2.
Circuitry is also provided on the ADSP-21992 EZ-KIT Lite board to allow you to use the SPORT
for RS-232 emulation. An ADM3202ARN line driver/receiver (A4) is provided to convert the
SPORT signals to the appropriate
±
10 V levels suitable for the UART connection to the PC. A
standard 9-pin female D-sub socket, P9, is provided on the ADSP-21992 EZ-KIT Lite board
Jumpers JP18, JP19, and JP20 connect the SPORT signals to the RS-232 circuitry. All three
jumpers must be closed to use the RS-232 interface circuitry.
