background image

U1
WL1835MODGA

E-13.4X13.3-N100_0.75-TOP

WL_BG ANT2

WL_BG/BT ANT1

Short PIN Header (1-2)
for entering test mode.
Open for function mode.

These two TPs for test mode
when WL_IRQ pull high.

EDGE CONNECTOR - MALE

J5

U.FL-R-SMT(10)

U.FL

1

2

3

SDIO_CMD_WL

R28

0R

0402

J2
NU_100pin Micro Edge MEC6

SD-100P

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

R30

0R

0402

SDIO_CLK_WL

ANT2
ANT016008LCD2442MA1

ANT-N3-1.6X0.8MM-B

5G

B2

FEED

A

2.4G

B1

R10

0R

0402

ANT1
ANT016008LCD2442MA1

ANT-N3-1.6X0.8MM-A

5G

B2

FEED

A

2.4G

B1

WLAN_EN_SOC

C12

NU

0402

L1

0402

1.1nH

C8

NU_10pF

0402

R5

NU_0R

0402

J6

U.FL-R-SMT(10)

U.FL

1

2

3

L2

1.5nH

0402

GPI

O9

3

GPI

O1

2

5

GPI

O1

1

2

GPI

O1

0

4

GND

17

VI

O

3

8

VBA

T

4

7

EXT

_32K

36

BT_AUD_FSY NC

58

BT_AUD_IN

56

BT_AUD_OUT

57

BT_AUD_CLK

60

W

L

_

S

D

IO

_

D

2

1

2

W

L_SD

IO_C

LK

8

W

L

_

S

D

IO

_

D

3

1

3

W

L

_

S

D

IO

_

D

0

1

0

W

L

_

S

D

IO

_

D

1

1

1

W

L

_

S

D

IO

_

C

M

D

6

BT_HCI_RTS

50

BT_HCI_RX

53

BT_HCI_TX

52

BT_HCI_CTS

51

GN

D

1

6

GPIO_4

25

GPIO_2

26

GPIO_1

27

BT

_EN

_SOC

4

1

W

L

A

N

_

IR

Q

1

4

W

L

AN

_EN

_SOC

4

0

B

T

_

U

A

R

T

_

D

B

G

4

3

W

L

_

U

A

R

T

_

D

B

G

4

2

GND G13

GND G14

GND G15

GND G16

GND G9

GND G10

GN

D

4

8

GND G11

GND G12

VBA

T

4

6

GND

28

GND G1

GND G2

GND G3

GND G4

GND G5

GND G6

GND G7

GND G8

2G4_ANT1_WB

32

GND

64

GN

D

1

GND

20

RESERVED1

21

RESERVED2

22

GN

D

3

7

GND

19

RESERVED3

62

GND G17

GND G18

GND

G19

GND

G20

GND

G21

GND

G22

GND

G23

GND

G24

GND

G25

GND

G26

GND

G27

GND

G28

GND

G29

GND

G30

GND

G31

GND

G32

GND

G33

GND

G34

GND

G35

GND

23

GND

59

GN

D

3

4

GND

29

GN

D

7

2G4_ANT2_W

18

GND

49

GN

D

9

GND

31

GN

D

3

5

GN

D

1

5

GND

55

GN

D

4

5

GN

D

4

4

GND

30

GND

24

GND

63

GND

61

GN

D

3

9

GN

D

3

3

GND

54

GND

G36

C5

10pF

0402

C6

10pF

0402

C11

1.2pF

0402

C14

4pF

0402

C10

NU_0.3pF

0402

C9

2pF

0402

VBAT_IN

VIO_IN

BT_FUNC1

C4

0.1uF

0402

C3

0.1uF

0402

R4

0R

0402

J3

HEADER 1x2

H-1X2_2MM

1

2

SLOW_CLK

TP2

1

TP8

1

R6

0R

0402

TP1

1

OSC1
1V8 / 32.768kHz

OSC-3.2X2.5

EN

1

VCC

4

OUT

3

GND

2

R3

0R

0402

J1
HEADER 1x2

H-1X2_2MM

1

2

VBAT_IN

VIO_IN

VIO_IN

WL_UART_DBG

C1

1uF

0402

BT_UART_DBG

BT_EN_SOC

WLAN_EN_SOC

R31

0R

0402

R32

0R

0402

R2

0R

0402

GPIO10

C2

10uF

0603

R1

0R

0402

R29

0R

0402

0R

R24

0402

R27

0R

0402

0R

R22

0402

R23

0R

0402

J4
HEADER 1x2

H-1X2_2MM

1 2

0R

R26

0402

R20

10k

0402

R25

0R

0402

SDIO_D3_WL

GPIO12

SDIO_D2_WL

GPIO11

SDIO_D0_WL

SDIO_D1_WL

GPIO9

WLAN_IRQ

GPIO10

VIO_IN

0R

R21

0402

BT_FUNC2

GPIO9

2G4_ANT2_W

R17 0R

0402

TP5

1

R12 0R

0402

WL_RS232_TX

TP4

1

WL_RS232_RX

2G4_ANT1_WB

BT_FUNC1

BT_FUNC2

R13 0R

0402

TP3

1

0R

R19

0402

2G4_ANT2_W

WLAN_IRQ

GPIO11

BT_AUD_CLK

BT_AUD_FSY NC

BT_AUD_IN

WL_RS232_TX

WL_RS232_RX

BT_HCI_TX

BT_HCI_RX

BT_HCI_CTS

BT_HCI_RTS

BT_EN_SOC

BT_UART_DBG

SDIO_CLK_WL

SDIO_CMD_WL

SDIO_D0_WL

SDIO_D2_WL

SDIO_D3_WL

SDIO_D1_WL

C13

8pF

0402

GPIO12

R14

0R

0402

R15

0R

0402

R18

0R

0402

R16

0R

0402

TP6

1

R11

0R

0402

BT_HCI_RX

R9

0R

0402

BT_HCI_TX

BT_HCI_CTS

BT_HCI_RTS

BT_AUD_IN

BT_AUD_OUT

BT_AUD_CLK

BT_AUD_FSY NC

R8

0R

0402

R7

0R

0402

2G4_ANT1_WB

BT_AUD_OUT

SLOW_CLK

C7

NU_10pF

0402

WL_UART_DBG

Circuit Design

www.ti.com

6

Circuit Design

6.1

Schematic

Figure 13. Schematic

14

WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI

SWRU359A – September 2013 – Revised October 2013

Sitara™ Platform

Submit Documentation Feedback

Copyright © 2013, Texas Instruments Incorporated

Summary of Contents for WL1835MODCOM8A

Page 1: ...WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform User s Guide Literature Number SWRU359A September 2013 Revised October 2013 ...

Page 2: ...teristics 9 4 Antenna Characteristics 9 4 1 VSWR 9 4 2 Efficiency 10 5 Antenna Characteristics 10 5 1 Radio Pattern 10 6 Circuit Design 14 6 1 Schematic 14 6 2 Bill of Materials BOM 15 7 Layout Guidelines 16 7 1 Board Layout 16 2 Table of Contents SWRU359A September 2013 Revised October 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 3: ...cific data sheets and user s guides For the most up to date version of the user s guide and data sheets go to http www ti com product wl1835mod Warning The WL1835MODCOM8A board is tested to comply with ETSI R TTE over temperatures from 0 to 70 C The WL1835MODCOM8A board is FCC and IC certified This board should not be modified to operate in other frequency bands other than what they are designed f...

Page 4: ...2 4 GHz MIMO 20 MHz channels Support for BLE dual mode Seamless integration with TI Sitara and other application processors Design for TI AM335X general purpose EVM WLAN and Bluetooth BLE cores are software and hardware compatible with prior WL127x WL128x and CC256x offerings for smooth migration to device Shared HCI transport for Bluetooth and BLE over UART and SDIO for WLAN WiFi Bluetooth single...

Page 5: ... 100 Mbps UDP Bluetooth 4 0 BLE Smart Ready WiFi Bluetooth Single Antenna Coexistence Low Power 30 50 Less than Previous Generation Available as Easy to Use FCC ETSI and Telec Certified Module Lower Manufacturing Costs Saving Board Space and Minimizing RF Expertise AM335x Linux and Android Reference Platform Accelerates Customer Development and Time to Market 5 SWRU359A September 2013 Revised Octo...

Page 6: ...t Figure 2 Board Top View Figure 3 Board Bottom View 6 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 7: ...d 23 N C No connection 24 SDIO_CMD I O WLAN SDIO command 25 N C No connection 26 SDIO_D0 I O WLAN SDIO data bit 0 27 N C No connection 28 SDIO_D1 I O WLAN SDIO data bit 1 29 N C No connection 30 SDIO_D2 I O WLAN SDIO data bit 2 31 N C No connection 32 SDIO_D3 I O WLAN SDIO data bit 3 33 N C No connection 34 WLAN_IRQ O WLAN SDIO interrupt out 35 N C No connection 36 N C No connection 37 GND G Groun...

Page 8: ...Clear to Send input 71 N C No connection 72 BT_UART_IF_RTS O Bluetooth HCI UART Request to Send output 73 N C No connection 74 BT_FUNC1 O BT_HOST_WAKE_UP Signal to wake up the host from Bluetooth 75 N C No connection 76 BT_UART_DEBUG O Bluetooth Logger UART output 77 GND G Ground 78 GPIO9 I O General purpose I O 79 N C No connection 80 N C No connection 81 N C No connection 82 N C No connection 83...

Page 9: ...aracteristics Refer to the detailed data in the WL1835MODGA data sheet for electrical characteristics 4 Antenna Characteristics 4 1 VSWR Figure 4 shows the antenna VSWR Figure 4 Antenna VSWR 9 SWRU359A September 2013 Revised October 2013 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 10: ...5 Antenna Characteristics 5 1 Radio Pattern Figure 6 shows the radio pattern of the WL1835MODCOM8A device Figure 6 10 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 11: ...ANT1 polarization of the WL1835MODCOM8A device Figure 7 Figure 8 11 SWRU359A September 2013 Revised October 2013 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 12: ...hows the ANT2 polarization of the WL1835MODCOM8A device Figure 10 12 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 13: ...istics Figure 11 Figure 12 13 SWRU359A September 2013 Revised October 2013 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 14: ...1 GND G32 GND G33 GND G34 GND G35 GND 23 GND 59 GND 34 GND 29 GND 7 2G4_ANT2_W 18 GND 49 GND 9 GND 31 GND 35 GND 15 GND 55 GND 45 GND 44 GND 30 GND 24 GND 63 GND 61 GND 39 GND 33 GND 54 GND G36 C5 10pF 0402 C6 10pF 0402 C11 1 2pF 0402 C14 4pF 0402 C10 NU_0 3pF 0402 C9 2pF 0402 VBAT_IN VIO_IN BT_FUNC1 C4 0 1uF 0402 C3 0 1uF 0402 R4 0R 0402 J3 HEADER 1x2 H 1X2_2MM 1 2 SLOW_CLK TP2 1 TP8 1 R6 0R 0402...

Page 15: ...C11 10 CAP 0402 2 2 pF 50 V C0G 0 1 pF GJM1555C1H2R2BB01 C9 11 CAP 0402 4 pF 50 V C0G 0 1 pF GJM1555C1H4R0BB01 C14 12 CAP 0402 8 pF 50 V C0G 0 1 pF GJM1555C1H8R0BB01 C13 13 CAP 0402 10 pF 50 V NPO 5 0402N100J500LT C7 C8 14 CAP 0402 0 1 µF 6 3 V X7R 10 0402B104K100CT C3 C4 15 CAP 0402 1 µF 6 3 V X5R 10 HF GRM155R60J105KE19D C1 16 CAP 0603 10 µF 6 3 V X5R 20 C1608X5R0J106M C2 R1 R2 R3 R4 R5 R6 R7 R8...

Page 16: ...re 15 Figure 16 Figure 17 Figure 18 and Figure 19 show instances of good layout practices Figure 14 Layer 1 Figure 15 Layer 2 16 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 17: ... 4 Have a solid ground plane and ground vias under the module for stable system and thermal dissipation Increase the ground pour in the first layer and have all of the traces from the first layer on the inner layers if 5 possible Signal traces can be run on a third layer under the solid ground layer which is below the module mounting 6 layer 17 SWRU359A September 2013 Revised October 2013 WL1835MO...

Page 18: ...race design for the PCB A 50 Ω impedance match on the trace to the antenna should be used Also 50 Ω traces are recommended for the PCB layout 18 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 19: ...red RF 2 traces must not have sharp corners 3 RF traces must have via stitching on the ground plane beside the RF trace on both sides 4 RF traces must have constant impedance microstrip transmission line For best results the RF trace ground layer must be the ground layer immediately below the RF trace The 5 ground layer must be solid 6 There must be no traces or ground under the antenna section RF...

Page 20: ...t Guidelines Figure 23 Bottom Layer Antenna and RF Trace Routing Layout Guidelines 20 WL1835MODCOM8A WLAN MIMO and BT Module Evaluation Board for TI SWRU359A September 2013 Revised October 2013 Sitara Platform Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 21: ... and D3 should be routed in parallel to each other and as short as possible less than 12 cm In addition every trace length must be the same as the others There should be enough space between traces greater than 1 5 times the trace width or ground to ensure signal quality especially for the SDIO_CLK trace Remember to keep them away from the other digital or analog signal traces TI recommends adding...

Page 22: ...vision Date Description Changes Changed all references of the device name from SWRS359A October 2013 WL1835MODCOM8 to WL1835MODCOM8A NOTE Page numbers for previous revisions may differ from page numbers in the current version 22 Revision History SWRU359A September 2013 Revised October 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Reviews: