UMTS/HSPA(+) Module Series
UC200T-EM Hardware Design
UC200T-EM_Hardware_Design 36 / 68
SDIO bus should be less than 15pF.
⚫
It is recommended to keep the trace length difference between CLK and DATA/CMD less than 1mm
and the total routing length less than 50mm. The total trace length inside the module is 30mm, so the
exterior total trace length should be less than 20mm.
“*” means under development.
3.12.
PCM and I2C Interfaces
UC200T-EM provides one Pulse Code Modulation (PCM) digital interface for audio design, which
supports the following mode:
⚫
Short frame synchronization mode: works as both master and slave
In short frame mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the
rising edge. The PCM_SYNC falling edge represents the MSB. In this mode, the PCM interface supports
256kHz, 512kHz, 1024kHz or 2048kHz PCM_CLK at 8kHz PCM_SYNC.
UC200T-EM supports 16-bit linear data format.
The following table shows the pin definition of PCM and I2C interfaces which can be applied on audio
codec design.
Table 15: Pin Definition of PCM and I2C Interfaces
Pin Name
Pin No. I/O
Description
Comment
PCM_IN
24
DI
PCM data input
1.8V power domain
If unused, keep it open.
PCM_OUT
25
DO
PCM data output
1.8V power domain
If unused, keep it open.
PCM_SYNC
26
IO
PCM data frame
synchronization signal
1.8V power domain
Output when module works as
master mode
Intput when module works as
salve mode
If unused, keep it open.
NOTE