8 pinout – Maxim Integrated DS21Q55 User Manual

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3.8 Pinout

DS21Q55 PIN DESCRIPTION Table 5-1

NOTE: Signal is common to all transceivers unless otherwise stated

PIN

SYMBOL

TYPE

DESCRIPTION

U3

A0

I

Address Bus Bit 0 (lsb).

L17

A1

I

Address Bus Bit 1.

V2

A2

I

Address Bus Bit 2.

T4

A3

I

Address Bus Bit 3.

V8

A4

I

Address Bus Bit 4.

H4

A5

I

Address Bus Bit 5.

U8

A6

I

Address Bus Bit 6.

P4

A7/ALE(AS)

I

Address Bus Bit 7 (msb) / Address Latch Enable.

M1

BPCLK1

O

Back Plane Clock, Transceiver # 1.

H17

BPCLK2

O

Back Plane Clock, Transceiver # 2.

F4

BPCLK3

O

Back Plane Clock, Transceiver # 3.

V13

BPCLK4

O

Back Plane Clock, Transceiver # 4.

P2

BTS

I

Bus Type Select (0 = Intel / 1 = Motorola),

P3

CS1*

I

Chip Select, Transceiver # 1.

A14

CS2*

I

Chip Select, Transceiver # 2.

B5

CS3*

I

Chip Select, Transceiver # 3.

K17

CS4*

I

Chip Select, Transceiver # 4.

U11

D0/AD0

I/O

Data Bus Bit 0/ Address/Data Bus Bit 0 (lsb).

J19

D1/AD1

I/O

Data Bus Bit 1/ Address/Data Bus Bit 1.

W15

D2/AD2

I/O

Data Bus Bit 2/Address/Data Bus Bit 2.

U7

D3/AD3

I/O

Data Bus Bit 3/Address/Data Bus Bit 3.

U9

D4/AD4

I/O

Data Bus Bit 4/Address/Data Bus Bit 4.

U5

D5/AD5

I/O

Data Bus Bit 5/Address/Data Bus Bit 5.

V4

D6/AD6

I/O

Data Bus Bit 6/Address/Data Bus Bit 6.

U4

D7/AD7

I/O

Data Bus Bit 7/Address/Data Bus Bit 7 (msb).

J3

DVDD1

–

Digital Positive Supply.

N4

DVDD1

–

Digital Positive Supply.

U2

DVDD1

–

Digital Positive Supply.

V5

DVDD1

–

Digital Positive Supply.

B12

DVDD2

–

Digital Positive Supply.

C12

DVDD2

–

Digital Positive Supply.

C16

DVDD2

–

Digital Positive Supply.

D18

DVDD2

–

Digital Positive Supply.

A9

DVDD3

–

Digital Positive Supply.

B3

DVDD3

–

Digital Positive Supply.

B6

DVDD3

–

Digital Positive Supply.

C4

DVDD3

–

Digital Positive Supply.

G20

DVDD4

–

Digital Positive Supply.

M17

DVDD4

–

Digital Positive Supply.

M20

DVDD4

–

Digital Positive Supply.

P18

DVDD4

–

Digital Positive Supply.

H3

DVSS1

–

Digital Signal Ground.

U6

DVSS1

–

Digital Signal Ground.

W8

DVSS1

–

Digital Signal Ground.

A17

DVSS2

–

Digital Signal Ground.