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KM736FV4021H-7 데이터시트(PDF) 9 Page - Samsung semiconductor

부품명 KM736FV4021H-7
상세설명  128Kx36 & 256Kx18 Synchronous Pipelined SRAM
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제조업체  SAMSUNG [Samsung semiconductor]
홈페이지  http://www.samsung.com/Products/Semiconductor
Logo SAMSUNG - Samsung semiconductor

KM736FV4021H-7 데이터시트(HTML) 9 Page - Samsung semiconductor

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Rev 1.0
KM718FV4021
128Kx36 & 256Kx18 SRAM
- 9 -
KM736FV4021
Dec. 1998
JTAG Instruction Coding
NOTE :
1. Places DQs in Hi-Z in order to sample all input data regardless of
other SRAM inputs.
2. TDI is sampled as an input to the first ID register to allow for the serial
shift of the external TDI data.
3. Bypass register is initiated to VSS when BYPASS instruction
is
invoked. The Bypass Register also holds serially loaded TDI
when exiting the Shift DR states.
4. SAMPLE instruction dose not places DQs in Hi-Z.
IR2
IR1
IR0 Instruction
TDO Output
Notes
0
0
0
SAMPLE-Z Boundary Scan Register
1
0
0
1
IDCODE
Identification Register
2
0
1
0
SAMPLE-Z Boundary Scan Register
1
0
1
1
BYPASS
Bypass Register
3
1
0
0
SAMPLE
Boundary Scan Register
4
1
0
1
BYPASS
Bypass Register
3
1
1
0
BYPASS
Bypass Register
3
1
1
1
BYPASS
Bypass Register
3
IEEE 1149.1 TEST ACCESS PORT AND BOUNDARY SCAN-JTAG
This part contains an IEEE standard 1149.1 Compatible Teat Access Port(TAP). The package pads are monitored by the Serial Scan
circuitry when in test mode. This is to support connectivity testing during manufacturing and system diagnostics. Internal data is not
driven out of the SRAM under JTAG control. In conformance with IEEE 1149.1, the SRAM contains a TAP controller, Instruction Reg-
ister, Bypass Register and ID register. The TAP controller has a standard 16-state machine that resets internally upon power-up,
therefore, TRST signal is not required. It is possible to use this device without utilizing the TAP. To disable the TAP controller without
interfacing with normal operation of the SRAM, TCK must be tied to VSS to preclude mid level input. TMS and TDI are designed so an
undriven input will produce a response identical to the application of a logic 1, and may be left unconnected. But they may also be
tied to VDD through a resistor. TDO should be left unconnected.
JTAG Block Diagram
SRAM
CORE
BYPASS Reg.
Identification Reg.
Instruction Reg.
Control Signals
TAP Controller
TDO
M2
M1
TDI
TMS
TCK
TAP Controller State Diagram
Test Logic Reset
Run Test Idle
0
1
1
1
1
0
0
0
1
0
1
1
0
0
0
1
0
1
1
1
0
0
0
0
0
0
0
Select DR
Capture DR
Shift DR
Exit1 DR
Pause DR
Exit2 DR
Update DR
Select IR
Capture IR
Shift IR
Exit1 IR
Pause IR
Exit2 IR
Update IR
1
1
1
1
1


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