AW-CU544 IEEE 802.11 b-g-n MAC-Baseband Radio and Bluetooth 5.2 IoT Module
User Guide
Rev. A
(For Standard)
AW-CU544 IEEE 802.11 b-g-n MAC-Baseband Radio and Bluetooth 5.2 IoT Module
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Revision History
| Version | Revision Date | Description | Initials | Approved |
| A | 11/6/2022 | • Initial Version | Steven Jian | Chihhao Liao |
Reference Schematic
Values (ex. capacitance, inductance, etc.) in the reference schematic are for reference only
Design Considerations
2.1 Power Supply
Keep noise sensitive power rail VDDA from other power/signal nets
DO NOT use Coin Cells for WLAN_VBAT rail. They are designed for low power device (<10mA), whereas the CYW43438 can consume up to 300mA average current
2.2 CapSense
Recommend use Port 8 (see Table 2) for its low self-capacitance inside the module
Every CapSense controller pin has some parasitic capacitance associated with it, adding an external resistor closed to the module (560 Ω for Self-capacitance and 2 kΩ for Mutual-capacitance) forms a low-pass RC filter that attenuates the RF noise amplitude coupled to the pin.
The simulation example below shows the mutual capacitance with different finger/sensor distance. Please evaluate your application and the capacitance requirement of the sensor provided by Infineon (refer to AN85951 – PSoC® 4 and PSoC® 6 MCU CapSense® Design Guide) along with our module pin parasitic capacitance shown in 2.4 P Pin parasitic capacitance to decide which sensing method suits your needs.
2.3 Debug Pins
Please leave the debug pins floating
| Table 1 | ||
| Pin No | Definition | Basic Description |
| D5 | BT_REG_ON | Reserved for debug use only |
| B1 | BT_UART_CTS | Reserved for debug use only |
| D2 | BT_UART_RTS | Reserved for debug use only |
| C2 | BT_UART_RXD | Reserved for debug use only |
| B2 | BT_UART_TXD | Reserved for debug use only |
| H4 | SDIO_CLK_TP | Floating Pin, No connect to anything. |
| G5 | SDIO_CMD_TP | Floating Pin, No connect to anything. |
| H5 | SDIO_DATA0_TP | Floating Pin, No connect to anything. |
| G4 | SDIO_DATA1_TP | Floating Pin, No connect to anything. |
| H7 | SDIO_DATA2_TP | Floating Pin, No connect to anything. |
| H6 | SDIO_DATA3_TP | Floating Pin, No connect to anything. |
| D6 | WL_GPIO1 | Reserved for debug use only |
| E6 | WL_GPIO2 | Reserved for debug use only |
| C1 | WL_REG_ON | Reserved for debug use only |
2.4 P Pin parasitic capacitance
| Table 2 | |||||
| Pin No. | Definition | Parasitic capacitance (pF) | Pin No. | Definition | Parasitic capacitance (pF) |
| K6 | P0_2 | 1 | E4 | P5_2 | 1.4 |
| J7 | P0_3 | 1.1 | F5 | P5_3 | 1.1 |
| K7 | P0_4 | 0.9 | D4 | P5_4 | 1.9 |
| J6 | P0_5 | 0.8 | B5 | P5_5 | 2.4 |
| M2 | P1_0 | 1.2 | B4 | P5_6 | 2.3 |
| M3 | P1_1 | 0.9 | C5 | P5_7 | 2.2 |
| K3 | P1_2 | 1.1 | F7 | P6_0 | 1 |
| L3 | P1_3 | 0.8 | E7 | P6_1 | 1.2 |
| L2 | P1_4 | 0.9 | E8 | P6_2 | 1.3 |
| J3 | P1_5 | 1 | G8 | P6_3 | 0.9 |
| R7 | P10_0 | 1.1 | F8 | P6_4 | 0.9 |
| R6 | P10_1 | 1 | E9 | P6_5 | 1.2 |
| P7 | P10_2 | 0.9 | E10 | P6_6 | 1.3 |
| L6 | P10_3 | 0.9 | D10 | P6_7 | 1.5 |
| N7 | P10_4 | 0.8 | F10 | P7_0 | 1.2 |
| M7 | P10_5 | 0.7 | H9 | P7_3 | 0.6 |
| M6 | P10_6 | 0.7 | G9 | P7_4 | 1 |
| R4 | P11_0 | 1.4 | G10 | P7_5 | 1.3 |
| L4 | P11_1 | 1.2 | J10 | P8_0 | 0.7 |
| R5 | P11_2 | 1 | K9 | P8_1 | 0.5 |
| N6 | P11_3 | 0.7 | L8 | P8_2 | 0.4 |
| M4 | P11_4 | 1.1 | K10 | P8_3 | 0.7 |
| P4 | P11_5 | 1.1 | L9 | P8_4 | 0.4 |
| P5 | P11_6 | 0.9 | M8 | P8_5 | 0.6 |
| M5 | P11_7 | 0.8 | L10 | P8_6 | 0.6 |
| R2 | P12_0 | 1.5 | M9 | P8_7 | 0.5 |
| R1 | P12_1 | 1.8 | P9 | P9_0 | 0.9 |
| N1 | P12_2 | 1.7 | N9 | P9_1 | 0.7 |
| P1 | P12_3 | 1.6 | M10 | P9_2 | 0.6 |
| P2 | P12_4 | 1.5 | N8 | P9_3 | 0.8 |
| N2 | P12_5 | 1.3 | P10 | P9_4 | 0.9 |
| C4 | P5_0 | 2.2 | N10 | P9_5 | 0.7 |
| F4 | P5_1 | 1.3 | R10 | P9_6 | 1.1 |
Documents / Resources
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AzureWave AW-CU544 IEEE 802.11 b-g-n MAC-Baseband Radio and Bluetooth 5.2 IoT Module [pdf] User Guide AW-CU544 IEEE 802.11 b-g-n MAC-Baseband Radio and Bluetooth 5.2 IoT Module, AW-CU544, IEEE 802.11 b-g-n MAC-Baseband Radio and Bluetooth 5.2 IoT Module, Radio and Bluetooth 5.2 IoT Module, Bluetooth 5.2 IoT Module, 5.2 IoT Module, IoT Module, Module |
