6.42
IDT70T3519/99/89S
High-Speed 2.5V 256/128/64K x 36 Dual-Port Synchronous Static RAM Industrial and Commercial Temperature Ranges
26
Identification Register Definitions
Instruction Field Value Description
Revision Number (31:28) 0x0 Reserved for version number
IDT Device ID (27:12)
0x330
(1)
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
5666 tbl 16
NOTE:
1. Device ID for IDT70T3599 is 0x331. Device ID for IDT70T3589 is 0x332.
Scan Register Sizes
Register Name Bit Size
Instruction (IR) 4
Bypass (BYR) 1
Identification (IDR) 32
Boundary Scan (BSR) Note (3)
5666 tbl 17
System Interface Parameters
Instruction Code Description
EXTEST 0000 Forces contents of the boundary scan cells onto the device outputs
(1)
.
Places the boundary scan register (BSR) between TDI and TDO.
BYPASS 1111 Places the bypass register (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) between TDI and TDO. Forces all
device output drivers to a High-Z state except COLx & INTx outputs.
CLAMP 0011
Uses BYR. Forces contents of the boundary scan cells onto the device
outputs. Places the bypass register (BYR) between TDI and TDO.
SAMPLE/PRELOAD 0001 Places the boundary scan register (BSR) between TDI and TDO.
SAMPLE allows data from device inputs
(2)
to be captured in the
boundary scan cells and shifted serially through TDO. PRELOAD allows
data to be input serially into the boundary scan cells via the TDI.
RESERVED 0101, 0111, 1000, 1001,
1010, 1011, 1100
Several combinations are reserved. Do not use codes other than those
identified above.
PRIVATE 0110,1110,1101 For internal use only.
5666 tbl 18
NOTES:
1. Device outputs = All device outputs except TDO.
2. Device inputs = All device inputs except TDI, TMS, and TRST.
3. The Boundary Scan Descriptive Language (BSDL) file for this device is available on the IDT website (www.idt.com), or by contacting your local
IDT sales representative.
