Texas Instruments TLV320ADC3101 Evaluation Module (EVM) and USB motherboard TLV320ADC3101EVM-K TLV320ADC3101EVM-K Datenbogen

Produktcode

TLV320ADC3101EVM-K

USB-MODEVM Protocol

Do the same with a fast mode I

C device:

[0]0x12
[1]0xA0
[2]0x02
[3]0x05
[4]0xAA
[5]0x55

Now with an SPI device which uses an 8-bit register address:

[0]0x10
[1]0xA0
[2]0x02
[3]0x05
[4]0xAA
[5]0x55

Now, do a 16-bit register address, as found on parts like the TSC2101. Assume the register address
(command word) is 0x10E0:

[0]0x14

[1]0x10

→

Note: the I

C address now serves as the MSB of the register address.

[2]0x02
[3]0xE0
[4]0xAA
[5]0x55

In each case, the TAS1020 returns, in an HID interrupt packet, the following:

[0]

interface byte | status

status:

REQ_ERROR 0x80

INTF_ERROR 0x40

REQ_DONE 0x20

[1]

for I

C interfaces, the I

C address as sent

for SPI interfaces, the read back-data from SPI line for transmission of the corresponding byte

[2]

length as sent

[3]

for I

C interfaces, the register address as sent

for SPI interfaces, the read-back data from SPI line for transmission of the corresponding byte

[4..60]

echo of data packet sent

SLAU267A – December 2008 – Revised October 2012

USB-MODEVM Protocol