MCM63Z737

DMCM63Z819

4

MOTOROLA FAST SRAM

MCM63Z737 PIN DESCRIPTIONS

Pin Locations

Symbol

Type

Description

85

ADV

Input

Synchronous Load/Advance: Loads a new address into counter when

low. RAM uses internally generated burst addresses when high.

89

CK

Input

Clock: This signal registers the address, data in, and all control signals

except G and LBO.

87

CKE

Input

Clock Enable: Disables the CK input when CKE is high.

(a) 51, 52, 53, 56, 57, 58, 59, 62, 63

(b) 68, 69, 72, 73, 74, 75, 78, 79, 80

(c) 1, 2, 3, 6, 7, 8, 9, 12, 13

(d) 18, 19, 22, 23, 24, 25, 28, 29, 30

DQx

I/O

Synchronous Data I/O: “x” refers to the byte being read or written

(byte a, b, c, d).

86

G

Input

Asynchronous Output Enable.

31

LBO

Input

Linear Burst Order Input: This pin must remain in steady state (this

signal not registered or latched). It must be tied high or low.

Low – linear burst counter.

High – interleaved burst counter.

32, 33, 34, 35, 44, 45, 46,

47, 48, 49, 50, 81, 82, 99, 100

SA

Input

Synchronous Address Inputs: These inputs are registered and must

meet setup and hold times.

36, 37

SA0, SA1

Input

Synchronous Burst Address Inputs: The two LSB’s of the address field.

These pins must preset the burst address counter values. These inputs

are registered and must meet setup and hold times.

93, 94, 95, 96

(a) (b) (c) (d)

SBx

Input

Synchronous Byte Write Inputs: Enables write to byte “x”

(byte a, b, c, d) in conjunction with SW. Has no effect on read cycles.

98

SE1

Input

Synchronous Chip Enable: Active low to enable chip.

97

SE2

Input

Synchronous Chip Enable: Active high for depth expansion.

92

SE3

Input

Synchronous Chip Enable: Active low for depth expansion.

88

SW

Input

Synchronous Write: This signal writes only those bytes that have been

selected using the byte write SBx pins.

15, 16, 41, 65, 91

VDD

Supply

Core Power Supply.

4, 11, 20, 27, 54, 61, 70, 77

VDDQ

Supply

I/O Power Supply.

5, 10, 14, 17, 21, 26, 40,

55, 60, 64, 66, 67, 71, 76, 90

VSS

Supply

Ground.

38, 39, 42, 43, 83, 84

NC

—

No Connection: There is no connection to the chip.