Contents
Main
72-Mbit QDR-II+ SRAM 4-Word Burst Architecture (2.0 Cycle Read Latency)
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
Features
Configurations
Functional Description
Logic Block Diagram (CY7C1541V18)
Logic Block Diagram (CY7C1556V18)
CY7C1543V18, CY7C1545V18
Document Number: 001-05389 Rev. *F Page 3 of 28
Logic Block Diagram (CY7C1543V18)
Logic Block Diagram (CY7C1545V18)
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
Pin Configuration
165-Ball FBGA (15 x 17 x 1.4 mm) Pinout
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
Pin Configuration
165-Ball FBGA (15 x 17 x 1.4 mm) Pinout
CY7C1541V18, CY7C1556V18
Pin Definitions
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
NC NC
Pin Definitions
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
Functional Overview
Read Operations
Write Operations
Byte Write Operations
Application Example
BUS MASTER (CPU or ASIC)
Truth Table
Write Cycle Descriptions
Page
IEEE 1149.1 Serial Boundary Scan (JTAG)
Disabling the JTAG Feature
Test Access PortTest Clock
Test Mode Select (TMS)
Test D ata- In (T DI)
Page
TAP Controller State Diagram
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
TAP Controller Block Diagram
TAP Electrical Characteristics
TAP AC Switching Characteristics
TAP Timing and Test Conditions
Identification Register Definitions
Scan Register Sizes
Instruction Codes
CY7C1541V18, CY7C1556V18 CY7C1543V18, CY7C1545V18
Boundary Scan Order
Power Up Sequence in QDR-II+ SRAM
Power Up Sequence
Clock Start (Clock Starts after VDD/VDDQ is Stable)
Fix HIGH (tie to VDDQ)
DLL Constraints
Maximum Ratings
Operating Range
Electrical Characteristics
DC Electrical Characteristics
AC Electrical Characteristics
Capacitance
Electrical Characteristics
DC Electrical Characteristics
Thermal Resistance
Switching Characteristics
Document Number: 001-05389 Rev. *F Page 24 of 28
Switching Waveforms
NOPREAD
RPS
WPS
A
Page
Ordering Information
Document Number: 001-05389 Rev. *F Page 27 of 28
Package Diagram
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Figure 6. 165-ball FBGA (15 x 17 x 1.4 mm), 51-85195
51-85195-*A
Document History Page