emc646sp16ak Emlsi Inc., emc646sp16ak Datasheet - Page 3

• Manufacturer Part Number: emc646sp16ak
• Description: 4mx16 Bit Cellularram
• Manufacturer: Emlsi Inc.

Table of Contents
Features ...................................................................................................................................................................................... 2
General Description .................................................................................................................................................................... 6
Functional Description ................................................................................................................................................................ 9
Bus Operating Modes ................................................................................................................................................................. 10
Low-Power Operation......... ........................................................................................................................................................ 16
Registers..................................................................................................................................................................................... 17
Electrical Characteristics............................................................................................................................................................. 29
Timing Requirements................................................................................................................................................................... 31
Timing Diagrams.......................................................................................................................................................................... 35
Asynchronous Mode ............................................................................................................................................................... 10
Power-Up Initialization ............................................................................................................................................................ 9
Mixed-Mode Operation ........................................................................................................................................................... 15
WAIT Operation ...................................................................................................................................................................... 15
Software Access ..................................................................................................................................................................... 21
Options ................................................................................................................................................................................... 2
Page Mode READ Operation ................................................................................................................................................ 11
Burst Mode Operation ............................................................................................................................................................ 12
LB# / UB# Operation............................................................................................................................................................... 15
Standby Mode Operation ....................................................................................................................................................... 16
Temperature Compensated Refresh....................................................................................................................................... 16
Partial Array Refresh .............................................................................................................................................................. 16
Deep Power-Down Operation................................................................................................................................................. 16
Access Using CRE ................................................................................................................................................................. 17
Bus Configuration Register..................................................................................................................................................... 22
Refresh Configuration Register............................................................................................................................................... 27
Device Identification Register.................................................................................................................................................. 28
Burst Length (BCR[2:0]) Default = Continuous Burst ......................................................................................................... 23
Burst Wrap (BCR[3]) Default = No Wrap ............................................................................................................................ 23
Latency Counter (BCR[13:11]) Default = Three Clock Latency .......................................................................................... 25
Deep Power-Down (RCR[4]) Default = DPD Disabled ....................................................................................................... 28
WAIT Configuration (BCR[8]) Default = WAIT Transitions One Clock Before Data Valid / Invalid...................................... 24
WAIT Polarity (BCR[10]) Default = WAIT Active HIGH....................................................................................................... 24
Initial Access Latency (BCR[14]) Default = Variable........................................................................................................... 25
Operating Mode (BCR[15]) Default = Asynchronous Operation......................................................................................... 26
Partial Array Refresh (RCR[2:0]) Default = Full Array Refresh ......................................................................................... 28
Page Mode Operation (RCR[7]) Default = Disabled .......................................................................................................... 28
Drive Strength (BCR[5:4]) Default = Outputs Use Half-Drive Strength .............................................................................. 24
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EMC646SP16AK
4Mx16 CellularRAM