CYD18S72V CYPRESS [Cypress Semiconductor], CYD18S72V Datasheet - Page 10

• Manufacturer Part Number: CYD18S72V
• Description: FLEx72 3.3V 64K/128K/256K x 72 Synchronous Dual-Port RAM
• Manufacturer: CYPRESS [Cypress Semiconductor]

Document #: 38-06069 Rev. *D
Table 4. Identification Register Definitions
Table 5. Scan Registers Sizes
Table 6. Instruction Identification Codes
EXTEST
BYPASS
IDCODE
HIGHZ
CLAMP
SAMPLE/PRELOAD
NBSRST
RESERVED
Note:
20. See details in the device BSDL files
Instruction
ID Register Presence (0)
Revision Number(31:28)
Cypress Device(27:12)
Cypress JDEC ID(11:1)
Instruction Field
TDI
18 Mbit
Register Name
TDO
TDO
Boundary Scan
0000
1111
1011
0111
0100
1000
1100
All other codes Other combinations are reserved. Do not use other than the above.
TDI
TDI
D2
D1
Identification
Instruction
Bypass
Code
TDO
TDO
TDI
TDI
D4
D3
Resets the non-boundary scan logic. Places BYR between TDI and TDO.
Captures the Input/Output ring contents. Places the BSR between the TDI and TDO.
Places the BYR between TDI and TDO.
Loads the IDR with the vendor ID code and places the register between TDI and TDO.
Places BYR between TDI and TDO. Forces all FLEx72 output drivers to a High-Z state.
Controls boundary to 1/0. Places BYR between TDI and TDO.
Captures the input/output ring contents. Places BSR between TDI and TDO.
TDO
PRELIMINARY
C002h
C001h
Value
034h
0h
1
Figure 3. Scan Chain
Reserved for version number
CYD09S72V.
Allows unique identification of FLEx72 family device vendor
Indicates the presence of an ID register
Defines Cypress DIE number for CYD18S72V and
Defines Cypress DIE number for CYD04S72V
Description
TDI
Description
4 Mbit/9 Mbit
Bit Size
n
32
4
1
[20]
TDO
TDO
TDI
TDI
D2
D1
CYD04S72V
CYD09S72V
CYD18S72V
TDO
Page 10 of 26