MT44K16M36 MICRON [Micron Technology], MT44K16M36 Datasheet - Page 107

• Manufacturer Part Number: MT44K16M36
• Description: 576Mb: x18, x36 RLDRAM 3
• Manufacturer: MICRON [Micron Technology]

Figure 70: JTAG Operation - Loading Instruction Code and Shifting Out Data
PDF: 09005aef84003617
576mb_rldram3.pdf – Rev. B 1/12 EN
Controller
Controller
State
State
TDO
TMS
TDO
TMS
TCK
TAP
TCK
TAP
TDI
TDI
T10
T0
Test-Logic-
Exit 2-IR
Reset
T11
T1
Update-IR
Run-Test
no guarantee as to the value that will be captured. Repeatable results may not be possi-
ble.
To ensure that the boundary-scan register will capture the correct value of a signal, the
RLDRAM signal must be stabilized long enough to meet the TAP controller’s capture
setup plus hold time (
correctly if there is no way in a design to stop (or slow) the clock during a SAMPLE/
PRELOAD instruction. If this is an issue, it is still possible to capture all other signals
and simply ignore the value of the CK and CK# captured in the boundary-scan register.
After the data is captured, it is possible to shift out the data by putting the TAP into the
shift-DR state. This places the boundary-scan register between the TDI and TDO balls.
BYPASS
When the BYPASS instruction is loaded in the instruction register and the TAP is placed
in a shift-DR state, the bypass register is placed between TDI and TDO. The advantage
of the BYPASS instruction is that it shortens the boundary-scan path when multiple de-
vices are connected together on a board.
Reserved for Future Use
The remaining instructions are not implemented but are reserved for future use. Do not
use these instructions.
Idle
T12
T2
Select-DR-
Scan
Select-DR-
SCAN
T13
T3
Capture-DR
Select-IR-
t
SCAN
CS plus
T14
T4
107
Shift-DR
t
CH). The RLDRAM clock input might not be captured
Capture-IR
IEEE 1149.1 Serial Boundary Scan (JTAG)
T15
T5
n-bit register
TDI and TDO
Micron Technology, Inc. reserves the right to change products or specifications without notice.
Shift
between
Shift-IR
DR
T16
T6
576Mb: x18, x36 RLDRAM 3
8-bit instruction
Exit1-DR
Shift IR
code
T17
T7
Transitioning Data
Update-DR
© 2011 Micron Technology, Inc. All rights reserved.
Exit 1-IR
T18
T8
Run-Test
Idle
Pause-IR
T19
Don’t Care
T9
Run-Test
Pause-IR
Idle