User's Manual

Cinterion
®
ELS31-VA/ELS51-VA Hardware Interface Description
3.7 Blocking against RF on Interface Lines
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 ELS31-VA_ELS51-VA_HID_v01.000 2017-01-04
Confidential / Preliminary
Page 74 of 106
The following table lists EMI measures that may be implemented for each signal line at the
module‘s SMT application interface.
Table 21: EMI measures on the application interface
Signal name EMI measures Remark
A B C
CCIN x
CCRST xxxThe external capacitor should be not higher than
10pF. The value of the capacitor depends on the
external application.
CCIO x x x
CCCLK x x x
RXD0 x x x
TXD0 xxx
CTS0 xxx
RTS0 xxx
GPIO1/DTR0 x x x
GPIO2/DCD0 x x x
GPIO3/DSR0 x x x
GPIO4/FST_SHDN x x x
GPO5/LED x x x
GPIO6 xxx
GPIO7 xxx
GPIO8/COUNTER x x x
GPIO16/RXD1/AP_WAKEUP x x x
GPIO17/TXD1/HOST_ACTIVE x x x
GPIO18/RTS1/CP_WAKEUP x x x
GPIO19/CTS1/SUSPEND x x x
GPIO20/PCM_I2S_OUT x x x
GPIO21/PCM_I2S_IN x x x
GPIO22/PCM_I2S_FSC x x x
GPO23/PCM_I2S_CLK x x x
GPIO24/RING0 x x x
GPIO25 xxx
GPO26/SPI_CS1 x x x
GPIO27/SPI_CS2 x x x
I2CDAT x The rising signal edge is reduced with an addi-
tional capacitor.
I2CCLK x
V180 x
VCORE x