Analog Devices ADSP-21369 system manual DPI Interface

EZ-KIT Lite Hardware Reference

To use the DAI for a different purpose, disable any signal driving the DAI pins with a switch (see “Codec Setup Switch (SW3)” on page 2-10). In addition, the SW3 switch allows flexible routing of the 12.288 MHz audio oscillator’s output signal. By default, this signal is used as the master clock (MCLK) for the AD1835A codec.

All of the DAI signals are available externally via the expansion interface connectors (J3–1), as well as the 0.1” spaced header P4. The pinout of these connectors can be found in “Schematics” on page B-1.

DPI Interface

The pins of the digital peripheral interface (DPI) connect to a second sig- nal routing unit (SRU2). The SRU2 unit, similar to the SRU, is a flexible routing system, providing a large system of signal flows within the proces- sor. In general, the SRU2 allows to route the DPI pins to different internal peripherals in various combinations.

ADSP-21369
		T2IN		T2OUT
		R2OUT	ADM3202	R2IN
DPI12 (UART CTS)		R1OUT		R1IN
		T1IN		T1OUT
DPI11 (UART RTS)
DPI10 (UART RX)
DPI9 (UART TX)
DPI14 (LED5)	LED5	CS/	SPI
DPI13 (LED4)	LED4	SCK
DPI8 (LED3)	LED3	SO	FLASH
DPI7 (LED2)	LED2	SI
DPI6 (LED1)	LED1
DPI5 (SPI_FLASHCS)
DPI4 (SPI_AD1835CS)		CLATCH
DPI3 (SPICLK)		CCLK	AD1835
DPI2 (MISO)		COUT
DPI1 (MOSI)		CIN

DB-9 Conn

Figure 2-3. DPI Connections Block Diagram

ADSP-21369 EZ-KIT Lite Evaluation System Manual 2-5