DS21448L datasheet(7/60 Pages) DALLAS

Part #	DS21448L

Description	3.3V E1/T1/J1 Quad Line Interface

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Manufacturer	DALLAS [Dallas Semiconductor]

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DS21448 3.3V T1/E1/J1 Quad Line Interface

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2. PIN DESCRIPTION

The DS21448 can be controlled in parallel port mode, serial port mode, or hardware mode. The bus interface select

bits 0 and 1 (BIS0, BIS1) determine the device mode and pin assignments (Table 2-A).

Table 2-A. Bus Interface Selection

BIS1

BIS0

BUS INTERFACE TYPE

0

Parallel Port Mode (multiplexed)

0

1

Parallel Port Mode (nonmultiplexed)

1

0

Serial Port Mode

1

Hardware Mode

Table 2-B. Pin Assignments

BGA

LQFP

I/O

PARALLEL PORT MODE

SERIAL PORT MODE

HARDWARE MODE

J3

18

I

CS1

EGL1

D3

57

I

CS2

EGL2

D10

84

I

CS3

EGL3

K10

114

I

CS4

EGL4

J2

91

I

RD (DS)

N/A

ETS

H1

92

I

WR (R/W)

N/A

NRZE

K2

95

I

ALE (AS)

N/A

SCLKE

J1

35

I

N/A

SCLK

L2

K3

36

I

N/A

SDI

L1

K1

62

I/O

A4

SDO

L0

L1

63

I

A3

ICES

DJA

H11

64

I

A2

OCES

JAMUX

H12

65

I

A1

N/A

JAS

G12

66

I

A0

N/A

HBE

J10

75

I/O

D7/AD7

N/A

CES

H10

76

I/O

D6/AD6

N/A

TPD

G11

77

I/O

D5/AD5

N/A

TX0

J9

78

I/O

D4/AD4

N/A

TX1

E3

79

I/O

D3/AD3

N/A

LOOP0

D4

80

I/O

D2/AD2

N/A

LOOP1

F3

81

I/O

D1/AD1

N/A

MM0

D5

82

I/O

D0/AD0

N/A

MM1

—

3

I

VSM

L5

115–117

—

VDD1

E4

19–21

—

VDD2

D8

49–51

—

VDD3

J8

85–87

—

VDD4

M4

118–120

—

VSS1

F4

22–24

—

VSS2

D9

52–54

—

VSS3

H9

88–90

—

VSS4

K9

97

I/O

INT

RT1

K5

110

O

PBEO1

G3

111

O

PBEO2

E10

121

O

PBEO3

K8

123

O

PBEO4

L6

126

O

RCL1/LOTC1

RCL1

D7

128

O

RCL2/LOTC2

RCL2

F9

1

O

RCL3/LOTC3

RCL3

J7

2

O

RCL4/LOTC4

RCL4

K7

98

I

TXDIS/TEST

A1

124

I

RTIP1

A4

28

I

RTIP2

A7

60

I

RTIP3

A10

93

I

RTIP4

B2

125

I

RRING1

B5

29

I

RRING2

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