Each of the SPORTs supports three operation modes: DSP SPORT mode, I
2
S mode (an
interface commonly used by audio codecs) and TDM (Time Division Multiplex)
multichannel mode. For additional information on the serial ports please refer to Chapter
9 of the
ADSP-21065L SHARC User’s Manual
.
Both of the synchronous serial ports are connected to the EMAFE interface. SPORT1 is
also connected to the on-board AD1819. Jumper JP3 is used to disable the AD1819, so it
doesn’t interfere with the EMAFE. For normal operation of the AD1819, JP3 must be
connected to GND. If the EMAFE is using SPORT1, the serial communication to the
AD1819A should be disabled by connecting JP3 to +3.3V
CC
.
3.2.2 POST Routines
POST (Power On Self Test) routines are a series of standard tests and initializations that the
EZ-KIT Lite performs on a power-on reset. To perform a power-on reset, disconnect power
to the board for at least three seconds and then reconnect power. The board automatically
resets (note that all the LED’s light up briefly). The user may also reset the board during
operation through the
Debug -> Reset
command from the debugger menu bar. Both types
of reset cause the DSP to reset to a known state and is followed by a message box that
displays the message “Communications Success”. At this point the user should reload any
programs he/she was working on. Table 3-3 shows the types of resets and their functions.
Table 3-3 Table 3-3. Post Routines
Routine
Power-on Reset
Reset During Operation
EPROM Check
Yes
No
Internal Memory Check
Yes
No
External Memory Check
Yes
No
UART Check
Yes
No
AD1819 Check
Yes
No
Initializations Yes
Yes
Error codes are transmitted to the PC and are displayed on the LEDs. If the LED remains
lit after reset, then the error has been caused by the component shown in Table 3-4
Table 3-4 Table 3-4. POST Error Codes
Flag LED
Error
4 EPROM
5 UART
6 AD1819
7 Memory
20
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