CYDMX256A16/CYDMX256B16
CYDMX128A16/CYDMX128B16
CYDMX064A16/CYDMX064B16
16 K/8 K/4 K 16 MoBL ADM
Asynchronous Dual-Port Static RAM
16 K/8 K/4 K 16 MoBL ADM Asynchronous Dual-Port Static RAM
Ultra low operating power
Features
Active: I = 15 mA (typical) at 90 ns
CC
True dual-ported memory block that allow simultaneous
Active: I = 25 mA (typical) at 65 ns
CC
independent access
Standby: I = 2 A (typical)
SB3
One port with dedicated time multiplexed address and data
Port independent power-down
(ADM) interface
One port configurable to standard SRAM or time multiplexed
On-chip arbitration logic
address and data interface
Mailbox interrupt for port to port communication
16 K/8 K/4 K 16 memory configuration
Input Read and Output Drive registers
High speed access
Upper byte and lower byte control
65 ns or 90 ns ADM interface
40 ns or 60 ns standard SRAM interface
Small package: 6 6 mm, 100-ball Pb-free BGA
Fully asynchronous operation
Industrial temperature range
Port independent 1.8 V, 2.5 V, and 3.0 V IOs
Block Diagram
IRR1-IRR0 [note 2]
SFEN# IRR/ODR
ODR4-ODR0
DataL<15..0> DataR<15..0>
I/OL15-I/OL8 I/OR15-I/OR8
Mux'ed Mux'ed
I/OL7-I/OL0 Dual Ported I/OR7-I/OR0
Address / Address/
Memory Array
Data Data
ADV#L ADV#R
AddrL<13..0>
16k/8k/4k x 16 AddrR<13..0>
I/O Control I/O Control
UB#R
UB#L
LB#L LB#R
A13-A0 [note 1]
Address Address
MSEL
Decode Decode
CS#L CS#R
OE#L Control Logic OE#R
WE#L WE#R
BUSY#L BUSY#R
INT#L INT#R
Notes
1. A13-A0 for CYDMX256A16 and CYDMX256B16; A12-A0 for CYDMX128A16 and CYDMX128B16; and A11-A0 for CYDMX064A16 and CYDMX064B16.
2. IRR1 and IRR2 not available for CYDMX256A16 and CYDMX256B16.
Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600
Document Number: 001-08090 Rev. *I Revised June 24, 2014CYDMX256A16/CYDMX256B16
CYDMX128A16/CYDMX128B16
CYDMX064A16/CYDMX064B16
Contents
Pin Configurations ...........................................................3 Switching Waveforms .................................................... 15
Pin Definitions ..................................................................4 Ordering Information ...................................................... 21
Functional Description .....................................................4 16 K 16 MoBL ADM
Power Supply ..............................................................4 Asynchronous Dual-Port SRAM ....................................... 21
ADM Interface Read or Write Operation .....................4 8 K 16 MoBL ADM
Standard SRAM Interface Asynchronous Dual-Port SRAM ....................................... 21
Read or Write Operation .....................................................5 4 K 16 MoBL ADM
Byte Select Operation .................................................5 Asynchronous Dual-Port SRAM ....................................... 21
Chip Select Operation .................................................5 Ordering Code Definitions ......................................... 21
Output Enable Operation .............................................5 Package Diagram ............................................................ 22
Mailbox Interrupts ........................................................5 Acronyms ........................................................................23
Arbitration Logic ..........................................................5 Document Conventions ................................................. 23
Input Read Register ....................................................5 Units of Measure ....................................................... 23
Output Drive Register ..................................................5 Document History Page ................................................. 24
Architecture ......................................................................6 Sales, Solutions, and Legal Information ...................... 25
Maximum Ratings .............................................................8 Worldwide Sales and Design Support ....................... 25
Operating Range ...............................................................8 Products ....................................................................25
Electrical Characteristics for VCC = 1.8 V ......................8 PSoC Solutions ...................................................... 25
Electrical Characteristics for VCC = 2.5 V ....................10 Cypress Developer Community ................................. 25
Electrical Characteristics for 3.0 V ...............................11 Technical Support ..................................................... 25
Capacitance ....................................................................11
Switching Characteristics for VCC = 1.8 V ...................12
Document Number: 001-08090 Rev. *I Page 2 of 25