资 源 简 介
EVM操作
The EVM is shipped from the factory in master/slave cascade mode. To check if the EVM is working properly， simply install the EVM onto the development platform and apply power to the DSK. The EVM should begin working immediately.
In the default mode， the codecs recognize that there are four discrete channels， consequently the resultant SCLK and FS signals transmitted by the master codec adjust automaTIcally based on the available MCLK.
It is now possible to calculate what should be observed after power up by calculaTIng what FS and SCLK should be observed：
: FS
In this example， MCLK is generated by the development platform and
is equal to 100 MHz.
FS = MCLK/16 &TImes; m &TImes; n × p
Default values for m， n， and p are 16， 6， and 8 respectively
FS = 100×106 /16 ×16 × 6 × 8
FS = 8138 kHz
: SCLK
SCLK = 16 × FS × （number of devices） × 2
SCLK = 16 × 8138 × 4 × 2
SCLK = 1.04 MHz
FS can be observed either directly at the FS pin of U1 or U2 （pin 19） or on the
development platform at TP9. SCLK can be observed easily at P1 pin 3 of the
EVM or on the development platform at TP8.
