Exar XRT83SL38/L38EVAL User Manual

XRT83SL38/L38EVAL User Manual

XRT83SL38/L38EVAL

EVALUATION SYSTEM

USER MANUAL

Page 1 of 23

XRT83SL38/L38EVAL User Manual

EVALUATION KIT PART LIST

This kit contains the following:

• XRT83SL38/L38EVAL Application Board

• XRT83SL38/L38 GUI Evaluation Software

• XRT83SL38/L38 128-Pin TQFP

• XRT83SL38/L38EVAL User Manual

• XRT83SL38/L38 Datasheet

FEATURES

• CPLD Design Which Emulates Microprocessor Support for the 8-Bit Parallel Interface

• 25 DIN Connector for Easy Connection Through a Standard Parallel Port to a PC

• CD ROM or Floppy Disk Containing the GUI Software (Executable File)

• Line Interface Modules Coupled to the Receiver Inputs and Transmitter Outputs

• Power Supply Design Allowing a Single 3V Supply voltage

• Accessible I/O Interface for Common Laboratory Equipment

• Optimized layout with Four Layers

INTRODUCTION

The XRT83SL38/L38EVAL is a complete printed circuit board for characterizing Exar’s
XRT83SL38/L38. The XRT83SL38/L38 is a fully integrated four channel, long haul, short haul
line interface unit for T1, E1 or J1 applications.

This application board combines a proven PC board layout with optimized analog and digital
interface circuitry. The XRT83SL38/L38EVAL contains the device being tested, CPLD for
emulating microprocessor support for the 8-bit parallel interfac e, line interface modules coupled to
the receiver inputs and transmitter outputs, and I/O headers for a flexible user interface.
Complete AC and DC performance of the XRT83SL38/L38 can be evaluated by interfacing
external laboratory equipment.

SYSTEM CONFIGURATION-LAB SETUP

The XRT83SL38/L38EVAL application board is setup as a common test c ircuit. Figur e 1 shows a
simplified block diagram of the default test configuration.

PC

Parallel Port Cable

Figure 1 Simplified Block Diagram of the XRT83SL38/L38EVAL Application Board

Page 2 of 23

ConnectorConnector

5

25 DIN Connector

CPLD

A[7:0]
D[7:0]

INT

PCLK

ALE
RST

HW/HOSTB

CS
WR
RD

RDY

TPOS[7:0]
TNEG[7:0]
TCLK[7:0]

RPOS[7:0]
RNEG[7:0]
RCLK[7:0]

XRT83SL38/L38 PCB

XRT83SL38

XRT83L38

LIU

TTIP[7:0]

TRING[7:0]

RTIP[7:0]

RRING[7:0]

ConnectorConnector

XRT83SL38/L38EVAL User Manual

APPLICATION CIRCUITRY

CPLD

The XRT83SL38/L38EVAL uses a CPLD designed to emulate a microproces sor support module
for an 8-Bit parallel interface. Using Exar’s GUI software (included in the evaluation kit), the
XRT83SL38/L38EVAL can be controlled through a standard parallel port cable connected to a
PC. The GUI was written to simplify the evaluation process of Exar’s LIU. Access to all the
control registers and functionality fo all four channels is available. For information on the GUI
software, see the “XRT83SL38/L38EVAL GUI SOFTWARE” s ection of this manual. Figure 2 is a
simplified block diagram of the CPLD interface.

CPLD

A[7:0]
D[7:0]

INT

HW/HOSTB

PCLK

ALE
RST

CS

WR

RD

RDY

XRT83SL38

XRT83L38

LIU

PC

Parallel Port Cable

5

25 DIN Connector

Figure 2 Simplified Block Diagram of the CPLD Interface

Line Interface Module

Internal Impedance Mode

The XRT83SL38/L38 has an internal and external impedance mode. For internal impedance
mode, no termination resistors are necessary for the transmit outputs. This allows the user to
have one bill of materials for all three applications . Figure 3 is a simplified block diagram of the
internal impedance mode. For external impedance mode, see the following sections for the
resistor values chosen for the corresponding application.

XRT83SL38/L38 LIU

Line Interface Module

TTIP

0.47uF

TRING

RTIP

RRING

Figure 3 Simplified Block Diagram of the Internal Impedance Mode

Page 3 of 23

XRT83SL38/L38EVAL User Manual

External Impedance Mode (T1/J1, 1.544MHz, 100ohm/110ohm)

The XRT83SL38/L38EVAL can be programmed for external impedance mode through the
microprocessor interface. For T1 applications, two 3.1ohm resistors are necessary on the
transmit outputs of the LIU. A 100ohm resistor is necess ary on the rec eiver inputs . (Note: Thes e
values do not change when using either a 1:2 or 1:2.45 turns ratio on the tr ansmit side) Figure 4
is a simplified block diagram of the external mode for T1 applications.

XRT83SL38/L38 LIU

TTIP

TRING

RTIP

Line Interface Module

3.1

3.1

100

1:2

RRING

Figure 4 Simplified Block Diagram of the External Mode, T1/J1

External Impedance Mode (E1, 2.048MHz, 75ohm or 120ohm)

The XRT83SL38/L38EVAL can be programmed for external impedance mode through the
microprocessor interface. For E1 applications, two 9.1ohm resistors are necessary on the
transmit outputs of the LIU. A 75ohm or 120ohm resistor is necessary on the receiver inputs.
(Note: The resistor values on the transmit side change to 6.2ohms when using a 1:2.45 turns
ratio) Figure 5 is a simplified block diagram of the external mode for E1 applications.

XRT83SL38/L38 LIU

TTIP

TRING

RTIP

RRING

75 (for 75ohm Termination)
120 (for 120ohm Termination)

Line Interface Module

9.1

9.1

1:2

1:1

Figure 5 Simplified Block Diagram of the External Mode, E1 75ohm and 120ohm

Page 4 of 23

XRT83SL38/L38EVAL User Manual

XRT83SL38/L38 OCTAL LONG HAUL, SHORT HAUL LIU MAIN INTERFACE

3V_AVDD

1492183551

TVDD

TVDD

AGND

AGND

AGND

1514739

RVDD

RVDD

RVDD

EXT_VCM

EXT_VCM

R8
OPEN

3V_RVDD

106

122

139

155

RVDD

RVDD

RVDD

RVDD

RVDD

EXT_VCM

EXT_VCM

EXT_VCM

EXT_VCM

EXT_VCM

EXT_VCM

109

119

142

152

EXT CLOCK

SMB1

3V_DVDD

1292425

7879130

181

182

183

AVDD

DVDD

DVDD

DVDD

DVDD

DVDD

DVDD

VDDPLL

AGND

GNDPLL

GNDPLL

13228297677

DGND

DGND

DGND

131

DGND

184

VDDPLL

DGND

185

TERSEL1
TERSEL0

CLKSEL0
CLKSEL1
CLKSEL2

MCLKOUT

186

RxTSEL
TxTSEL

84

TxTSEL

TERSEL1

85

TERSEL0

86

TEST

87

TEST

199

DMO0

10

DMO1

147

DMO2

166

DMO3

62

DMO4

43

DMO5

114

DMO6

95

DMO7

CLKSEL0

187

CLKSEL1

188

CLKSEL2

189

MCLKE1

26

MCLKE1

MCLKT1

27

MCLKT1

23

TAOS7

66

TAOS7

TAOS6

65

TAOS6

TAOS5

64

TAOS5

TAOS4

63

TAOS4

TAOS3

198

TAOS3

TAOS2

197

TAOS2

TAOS1

196

TAOS1

TAOS0

195

TAOS0

ICT

88

ICT

DGND

Design File Name = H:\XRT LIU\XRT83L38\SCHEMATIC\XRT83L38 EVAL.DSN

EXAR AD Infinitum

Title

XRT83SL38/L38

Size Document Number Rev

XRT83SL38/L38 LONG HAUL, SHORT HAUL LIU D

C

Date: Sheet

13Tuesday, September 17, 2002

TP1

T

1

of

P1

DB25

3V_SUP

C4

C5

C2

C3

C1

0.1uF

0.1uF

0.1uF

0.1uF

0.1uF

84284

1411375573

109

VCC

VCC

VCC

VCC

GND

GND

GND

182936476272899099

127

VCCIO

VCCIO

VCCIO

VCCIO

VCCIO

VCCIO

4

SR/DR

126

RESET

41

JASEL1

43

JASEL0

46

FIFOS

121

RxRES0

124

RxRES1

113

RxMUTE

33

A7_LOOP13

31

A6_LOOP03

28

A5_LOOP12

27

A4_LOOP02

26

A3_LOOP11

25

A2_LOOP01

24

A1_LOOP10

23

A0_LOOP00

135

D7_LOOP14

134

D6_LOOP04

133

D5_LOOP15

132

D4_LOOP05

131

D3_LOOP16

130

D2_LOOP06

129

D1_LOOP17

128

D0_LOOP07

106

PCLK_ATAOS

103

INT_TRATIO

101

PTS1_RCLKE

102

PTS2_TCLKE

14

RDY_EQC4

15

CS_EQC3

16

ALE_EQC2

19

WR_EQC0

17

RD_EQC1

125

MODE

RxTSEL

120

RxTSEL

TxTSEL

119

TxTSEL

TERSEL1

118

TERSEL1

TERSEL0

117

TERSEL0

TEST

116

TEST

CLKSEL0

22

CLKSEL0

CLKSEL1

21

CLKSEL1

CLKSEL2

20

CLKSEL2

ICT

115

ICT

TAOS7

136

TAOS7

TAOS6

137

TAOS6

TAOS5

138

TAOS5

TAOS4

139

TAOS4

TAOS3

10

TAOS3

TAOS2

11

TAOS2

TAOS1

12

TAOS1

TAOS0

13

TAOS0

GND

GND

GND

GND

GND

GND

GND

GND

GND

GND

108

114

123

144

R9

4.7k

MCLKT1

R10
36

U4

5

1.544MHz

J2

1 2

++

J3

1 2

++

3V_SUP

8

VCC

CLK

4

GND

U2

TxON7
TxON6
TxON5
TxON4
TxON3
TxON2
TxON1
TxON0

CODES7
CODES6
CODES5
CODES4
CODES3
CODES2
CODES1
CODES0

H1

1

2

+

+

3

4

+

+

5

6

+

+

3V_SUP

JTAG

1
14

R2

2
15

470

R3

3
16

470

R4

4
17

470

R5

5
18

470

6
19
7
20
8
21
9
22

R13

10
23

36

11
24
12
25
13

107

TxON7

110

TxON6

111

TxON5

112

TxON4

34

TxON3

35

TxON2

39

TxON1

40

TxON0

XC95144XL

104

CODES7

105

CODES6

140

CODES5

142

CODES4

45

CODES3

44

CODES2

9

CODES1

7

CODES0

32

GCK2

38

GCK3

5

GTS1

6

GTS2

2

GTS3

3

GTS4

143

GSR

65

TMS

67

TCK

63

TDI

122

TDO

70

SRST

68

SCS

66

SCK

69

SDI

71

SDO

30

MCLK

R7

R6

36

4.7k

U3

3V_SUP
8

VCC

5

CLK

4

GND

16.384MHz

3V_RVDD

U1A

8124145112

116

145

TVDD

TVDD

TVDD

TVDD

TVDD

TVDD

30 83

SR/DR RxTSEL

75

RESET

168

JASEL1

167

JASEL0

134

FIFOS

82

RxRES0

81

RxRES1

89

RxMUTE

173

A7_LOOP13

174

A6_LOOP03

175

A5_LOOP12

176

A4_LOOP02

177

XRT83SL38/L38

A3_LOOP11

178

A2_LOOP01

179

A1_LOOP10

180

A0_LOOP00

67

D7_LOOP14

68

D6_LOOP04

69

D5_LOOP15

70

D4_LOOP05

71

D3_LOOP16

72

D2_LOOP06

73

D1_LOOP17

74

D0_LOOP07

94

PCLK_ATAOS

J1

127

1 2

INT_TRATIO

++

133

PTS1_RCLKE

128

PTS2_TCLKE

194

RDY_EQC4

193

CS_EQC3

192

ALE_EQC2

190

WR_EQC0

191

RD_EQC1

80

MODE

3V_SUP

R1
10k

AGND

AGND

AGND

AGND

AGND

614143

118

1105153848

MCLKE1

R11

R12

4.7k

36

U5

3V_SUP

8

VCC

5

CLK

4

GND

2.048MHz

Figure 6 XRT83SL38/L38EVAL Schematic Page 1

Page 5 of 23

XRT83SL38/L38EVAL User Manual

CODES0

CODES1

CODES2

CODES3

C32

RCLK0
RPOS0
RNEG0

RCLK1
RPOS1
RNEG1

RCLK2
RPOS2
RNEG2

RCLK3
RPOS3
RNEG3

C29

0.1uF

C33

C30

0.1uF

0.1uF

C34

0.1uF

S2

1
2
3
45

HEADER 4X2

S5

1
2
3
45

HEADER 4X2

S7

1
2
3
45

HEADER 4X2

S10

1
2
3
45

HEADER 4X2

0.1uF

C22

C35

8
7
6

8
7
6

8
7
6

8
7
6

POWER CIRCUITRY

3V_AVDD

C13

C12

C14

C11

0.1uF

0.1uF

0.1uF

3V_DVDD

C25

C24

C26

0.1uF

0.1uF

C23

0.1uF

C36

0.1uF

C16

0.1uF

0.1uF

0.1uF

3V_RVDD

C38

C37

C39

C31

0.1uF

0.1uF

0.1uF

LIU TRANSMIT AND RECEIVE

203
204
205

RCLK0

207

RPOS0

1

RNEG0

208

202
201
200

RCLK1

21

RPOS1

19

RNEG1

20

163
164
165

RCLK2

136

RPOS2

138

RNEG2

137

162
161
160

RCLK3

158

RPOS3

156

RNEG3

157

206

22
135
159

TxON0
TxON1
TxON2
TxON3

169
170
171
172

3V

B1

J4

1 2

++

+

10uF

+

C15

J5

1 2

++

+

10uF

J14

1 2

++

+

10uF

U1B

TCLK0
TPOS0
TNEG0_CODES0

RCLK0
RPOS0
RNEG0_LCV0

TCLK1
TPOS1
TNEG1_CODES1

RCLK1
RPOS1
RNEG1_LCV1

XRT83SL38/L38

TCLK2
TPOS2
TNEG2_CODES2

RCLK2
RPOS2
RNEG2_LCV2

TCLK3
TPOS3
TNEG3_CODES3

RCLK3
RPOS3
RNEG3_LCV3

RLOS0
RLOS1
RLOS2
RLOS3

TxON0
TxON1
TxON2
TxON3

BANNANA PLUGS

1

3V_SUP

470

R14

10uF

D2

LED

9

TRING0

7

TTIP0

4

RRING0

3

RTIP0

11

TRING1

13

TTIP1

16

RRING1

17

RTIP1

146

TRING2

144

TTIP2

141

RRING2

140

RTIP2

148

TRING3

150

TTIP3

153

RRING3

154

RTIP3

D1

5.6V

2 1

R89 0.47uF
R90 3.0
R91 6.2
R92 9.1

R93 0.0
R94 3.0
R95 6.2
R96 9.1

R97 25.0
R98 18.7
R99 30.1

R100 0.47uF
R101 3.0
R102 6.2
R103 9.1

R104 0.0
R105 3.0
R106 6.2
R107 9.1

R108 25.0
R109 18.7
R110 30.1

R111 0.47uF
R112 3.0
R113 6.2
R114 9.1

R115 0.0
R116 3.0
R117 6.2
R118 9.1

R119 25.0
R120 18.7
R121 30.1

R122 0.47uF
R123 3.0
R124 6.2
R125 9.1

R126 0.0
R127 3.0
R128 6.2
R129 9.1

R130 25.0
R131 18.7
R132 30.1

GND

B2

1 2

++

S27

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1 2

++

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1 2

++

S31

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1 2

++

S33

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1

T1

8

2

S28

See Note 1

T2

8S29

2

S30

See Note 1

T3

8

2

S32

See Note 1

T4

8

2

S34

See Note 1

GROUND POINTS

TP2

1

T

TP3

1

T

TP4

1

T

TP5

1

T

J6

9

1
2

1067

3
4

11

5

143

6
78910

15
161

RJ48

J7

9

1
2

1067

3
4

11

5

143

6
78910

15
161

RJ48

J8

9

1
2

1067

3
4

11

5

143

6
78910

15
161

RJ48

J9

9

1
2

1067

3
4

11

5

143

6
78910

15
161

RJ48

ISOLATION1

ISOLATION2

OPEN

R51

OPEN

OPEN

MOUNTING HOLES

Tx=1:2, Rx=1:1

Note 1: Transformer Selection

C27

TRANSPOWER SMD606-05

+

HALO TG74-1505N1

R88

C28

+

OPEN

M1

MHOLE

M2

MHOLE

M3

MHOLE

M4

MHOLE

1

MH

1

MH

1

MH

1

MH

Figure 7 XRT83SL38/L38EVAL Schematic Page 2

Page 6 of 23

Design File Name = H:\XRT LIU\XRT83L38\SCHEMATIC\XRT83L38 EVAL.DSN

EXAR AD Infinitum

Title

XRT83SL38/L38

Size Document Number Rev

XRT83SL38/L38 LONG HAUL, SHORT HAUL LIU D

C

Date: Sheet

of

23Tuesday, July 02, 2002

XRT83SL38/L38EVAL User Manual

LIU TRANSMIT AND RECEIVE

CODES4

RCLK4
RPOS4
RNEG4

CODES5

RCLK5
RPOS5
RNEG5

CODES6

RCLK6
RPOS6
RNEG6

CODES7

RCLK7
RPOS7
RNEG7

S15

1

8

2

7

3

6

45

HEADER 4X2

S18

1

8

2

7

3

6

45

HEADER 4X2

S20

1

8

2

7

3

6

45

HEADER 4X2

S23

1

8

2

7

3

6

45

HEADER 4X2

TxON4
TxON5
TxON6
TxON7

RCLK4
RPOS4
RNEG4

RCLK5
RPOS5
RNEG5

RCLK6
RPOS6
RNEG6

RCLK7
RPOS7
RNEG7

U1C

58

TCLK4

57

TPOS4

56

TNEG4_CODES4

54

RCLK4

52

RPOS4

53

RNEG4_LCV4

59

TCLK5

60

TPOS5

61

TNEG5_CODES5

32

RCLK5

34

RPOS5

33

RNEG5_LCV5

XRT83SL38/L38

98

TCLK6

97

TPOS6

96

TNEG6_CODES6

125

RCLK6

123

RPOS6

124

RNEG6_LCV6

99

TCLK7

100

TPOS7

101

TNEG7_CODES7

103

RCLK7

105

RPOS7

104

RNEG7_LCV7

55

RLOS4

31

RLOS5

126

RLOS6

102

RLOS7

90

TxON4

91

TxON5

92

TxON6

93

TxON7

TRING4

TTIP4

RRING4

RTIP4

TRING5

TTIP5

RRING5

RTIP5

TRING6

TTIP6

RRING6

RTIP6

TRING7

TTIP7

RRING7

RTIP7

44

46
49

50

42

40
37

36

115

117
120

121

113

111
108

107

R133 0.47uF
R134 3.0
R135 6.2
R136 9.1

R137 0.0
R138 3.0
R139 6.2
R140 9.1

R141 25.0
R142 18.7
R143 30.1

R144 0.47uF
R145 3.0
R146 6.2
R147 9.1

R148 0.0
R149 3.0
R150 6.2
R151 9.1

R152 25.0
R153 18.7
R154 30.1

R155 0.47uF
R156 3.0
R157 6.2
R158 9.1

R159 0.0
R160 3.0
R161 6.2
R162 9.1

R163 25.0
R164 18.7
R165 30.1

R166 0.47uF
R167 3.0
R168 6.2
R169 9.1

R170 0.0
R171 3.0
R172 6.2
R173 9.1

R174 25.0
R175 18.7
R176 30.1

1 2

++

S35

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1 2

++

S37

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1 2

++

S39

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

1 2

++

S41

3 4

++

5 6

++

7 8

++

9 10

++

11 12

++

13 14

++

15 16

++

5612

34

T5

J10

9

8

2

S36

See Note 1

8

2

S38

See Note 1

8

2

S40

See Note 1

8

2

S42

See Note 1

1
2

1067

3
4

11

5

143

6
78910

15
161

RJ48

T6

9
1067
11

143
15
161

T7

9
1067
11

143
15
161

T8

9
1067
11

143
15
161

J11

1
2
3
4
5
6
78910

RJ48

J12

1
2
3
4
5
6
78910

RJ48

J13

1
2
3
4
5
6
78910

RJ48

ISOLATION1

Tx=1:2, Rx=1:1

Note 1: Transformer Selection

TRANSPOWER SMD606-05
HALO TG74-1505N1

ISOLATION2

Design File Name = H:\XRT LIU\XRT83L38\SCHEMATIC\XRT83L38 EVAL.DSN

EXAR AD Infinitum

Title

XRT83SL38/L38

Size Document Number Rev

XRT83SL38/L38 LONG HAUL, SHORT HAUL LIU D

C

Date: Sheet

of

33Tuesday, July 02, 2002

Figure 8 XRT83SL38/L38EVAL Schematic Page 3

Page 7 of 23