IDT70V7319S_15 Datasheet, PDF (20/22 Pages) Integrated Device Technology – HIGH-SPEED 3.3V 256K x 18 SYNCHRONOUS BANK-SWITCHABLE DUAL-PORT STATIC RAM

IDT70V7319S
High-Speed 256K x 18 Synchronous Bank-Switchable Dual-Port Static RAM
Industrial and Commercial Temperature Ranges
Identification Register Definitions
Instruction Field
Value
Description
Revision Number (31:28)
0x0
Reserved for version number
IDT Device ID (27:12)
0x309
Defines IDT part number
IDT JEDEC ID (11:1)
0x33
Allows unique identification of device vendor as IDT
ID Register Indicator Bit (Bit 0)
1
Indicates the presence of an ID register
5629 tbl 13
Scan Register Sizes
Register Name
Instruction (IR)
Bypass (BYR)
Identification (IDR)
Boundary Scan (BSR)
Bit Size
4
1
32
Note (3)
5629 tbl 14
System Interface Parameters
Instruction
Code
Description
EXTEST
0000
Forces contents of the bound ary scan cells onto the device outputs⁽¹⁾.
Places the boundary scan registe r (BSR) between TDI and TDO.
BYPASS
1111
Places the bypass registe r (BYR) between TDI and TDO.
IDCODE
0010
Loads the ID register (IDR) with the vendor ID code and places the
register between TDI and TDO.
HIGHZ
0100
Places the bypass register (BYR) be tween TDI and TDO. Forces all
device output drivers to a High-Z state.
CLAMP
0011
Uses BYR. Forces contents of the bound ary scan cells onto the device
outputs. Places the bypass registe r (BYR) between TDI and TDO.
SAMPLE/PRELOAD
0001
Places the boundary scan registe r (BSR) between TDI and TDO.
SAMPLE allows data from device inputs⁽²⁾ and outputs⁽¹⁾ to be captured
in the boundary scan cells and shifted serially through TDO. PRELOAD
allows data to be input serially into the b oundary scan cells via the TDI.
RESERVED
All other codes
Several combinations are reserved. Do not use codes other than those
identified above.
NOTES:
1. Deviceoutputs=AlldeviceoutputsexceptTDO.
2. Device inputs = All device inputs except TDI, TMS, TRST, and TCK.
3. TheBoundaryScanDescriptiveLanguage(BSDL)fileforthisdeviceisavailableontheIDTwebsite(www.idt.com),orbycontactingyourlocal
IDT sales representative.
5629 tbl 15
6.4220