User's Manual

LTE Module Series
EC25Hardware Design
EC25_Hardware_DesignConfidential / Released 55 / 90
Module
SDC1_DATA3
SDC1_DATA2
SDC1_DATA1
SDC1_DATA0
SDC1_CLK
SDC1_CMD
WLAN_EN
COEX_UART_TX
WAKE_ON_WIRELESS
COEX_UART_RX
WLAN_SLP_CLK
BT_EN
PM_ENABLE
BT_RTS
BT_CTS
BT_TXD
BT_RXD
PCM_IN
PCM_OUT
PCM_CLK
DCDC/LDO
PCM_SYNC
SDIO_D3
SDIO_D2
SDIO_D1
SDIO_D0
SDIO_CLK
SDIO_CMD
WLAN_EN
32KHz_IN
WAKE_ON_WIRELESS
LTE_UART_TXD
LTE_UART_RXD
FC20 Module
BT_EN
BT_UART_RTS
BT_UART_CTS
BT_UART_RXD
BT_UART_TXD
PCM_OUT
PCM_IN
PCM_CLK
PCM_SYNC
VDD_3V3
WLAN
COEX & Control
BT
Figure 29: Reference Circuit of Wireless Connectivity Interfaces with FC20 Module
1. FC20 module can only be used as a slave device,
2. When BT function is enabled on EC25 module, PCM_SYNC and PCM_CLK pins are only used to
output signals.
3. For more information about wireless connectivity interfaces application, please refer to document
[5].
3.18.1. WLAN Interface
EC25 provides a low power SDIO 3.0 interface and control interface for WLAN design.
SDIO interface supports the following modes:
 Single data rate(SDR) mode (up to 200MHz)
 Double data rate(DDR) mode (up to 52MHz)
NOTES