Comtrue CT-7301, Manual, Page: 4 / 12

Comtrue Inc.
CT-7301 demo board manual
Version 0.9 - 4 - 11/17/2014
Copyright © 2014 comtrue Inc. All rights reserved.
Output port
CT7301 demo board has 3 kinds of output, SPDIF(toslink x1, coaxtial x1), I2S, and
DSD.
Input signal SPDIF port I2S port DSD port
PCM data PCM PCM Mute
Non-PCM data Non-PCM Non-PCM Mute
Native DSD data
(enable D2P) PCM PCM DSD
Native DSD data
(disable D2P) DoP DoP DSD
DoP data
(enable D2P) PCM PCM DSD
DoP data
(disable D2P) DoP DoP DSD
H/W configuration setting
CT7301 H/W configuration is controlled by PORx pins. You could modify the
settings by Jumper J21.
Connect the left two pins = 0.
Connect the right two pins = 1
PORx setting table:
Pin Name Description Function Table
POR[1]
POWER_ON_LATCH[1] = SEL_DSD_I2SZ_IN Select DSD or I2S-channel2 pins definition (pin 13,14,15)
0 = I2S channel 2
1 = DSD
POR[3:2]
POWER_ON_LATCH[3:2] = SEL_XTAL[1:0] Select Crystal frequency
00 = 12MHz