DR-WLS1273L-102 RFM, DR-WLS1273L-102 Datasheet - Page 6

• Manufacturer Part Number: DR-WLS1273L-102
• Description: WiFi / 802.11 Modules 2.4 and 5.8GHz + BT
• Manufacturer: RFM

Specifications of DR-WLS1273L-102

• Rohs: yes
• Protocol Supported: 802.11 a/b/g
• Frequency Band: 64 kHz to 4 GHz
• Data Rate: 1 Mbps, 2 Mbps, 5.5 Mbps, 11 Mbps
• Interface Type: SDIO, UART
• Operating Supply Voltage: 3 V to 4.2 V
• Supply Current Transmitting: 350 mA
• Supply Current Receiving: 150 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Modulation Technique: CCK, DSSS

• Receiver detection of break, idle, framing, FIFO overflow, and parity error conditions
• Transmitter underflow detection
• CTR/RTS hardware flow control
BT UART 4-Wire Interface - H4
The interface includes four signals: TXD, RXD, CTS and RTS. Flow control between the host and the
DR-WLS1273L-102 is byte-wise by hardware. Flow control is obtained by the following:
When the UART RX buffer asses the “flow control” threshold, it sets the UART_RTS signal high to stop
transmission from the host. When the UART_CTS signal is set high, the DR-WLS1273L-102 stops trans-
mitting on the interface. In case HCI_CTS is set high in the middle of transmitting a byte, the DR-
WLS1273L-102 finishes transmitting the byte and stops the transmission.
BT UART 3-Wire Interface - H5
This interface consists of three signals: TXD, RXD and GND:
XON/XOFF software flow control is normally used.
The DR-WLS1273L-102 also supports a four-wire mode for H5, with RTS/CTS hardware flow control.
Since the same UART module is used for the 3- and 4-wire HCI UART interface, all features supported by
the 4-wire interface are also supported for the 3-wire interface. H5 features:
• Flow control configured with HCI_VS command, software XON/XOFF, hardware (RTS/CTS), or none
• Power management
• Configurable timers for re-transmission management
• CRC
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© 2012 by RF Monolithics, Inc.
HCI_RX Receive Data on the UART Interface
HCI_TX Transmit Data on the UART Interface
GND Ground
Technical support +1.972.448.3700
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DR-WLS1273L-102 Data Sheet - 12/13/12
Page 6 of 31