8.10.00 J-TRACE ARM Segger Microcontroller Systems, 8.10.00 J-TRACE ARM Datasheet - Page 189
![JTAG EMULATOR ARM7/ARM9 ETM](/photos/9/27/92738/8_10_00-j-trace-arm_sml.jpg)
8.10.00 J-TRACE ARM
Manufacturer Part Number
8.10.00 J-TRACE ARM
Description
JTAG EMULATOR ARM7/ARM9 ETM
Manufacturer
Segger Microcontroller Systems
Type
Emulatorr
Specifications of 8.10.00 J-TRACE ARM
Contents
Emulation Module
For Use With/related Products
ARM7, ARM9
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
899-1006
- Current page: 189 of 222
- Download datasheet (3Mb)
9.1.4
9.1.4.1 State descriptions
J-Link / J-Trace (UM08001)
The TAP controller is a synchronous finite state machine that responds to changes at
the TMS and TCK signals of the TAP and controls the sequence of operations of the
circuitry.
TAP controller state diagram
Reset
The test logic is disabled so that normal operation of the chip logic can continue
unhindered. No matter in which state the TAP controller currently is, it can change
into Reset state if TMS is high for at least 5 clock cycles. As long as TMS is high, the
TAP controller remains in Reset state.
Idle
Idle is a TAP controller state between scan (DR or IR) operations. Once entered, this
state remains active as long as TMS is low.
DR-Scan
Temporary controller state. If TMS remains low, a scan sequence for the selected
data registers is initiated.
IR-Scan
Temporary controller state. If TMS remains low, a scan sequence for the instruction
register is initiated.
Capture-DR
Data may be loaded in parallel to the selected test data registers.
Shift-DR
The test data register connected between TDI and TDO shifts data one stage towards
the serial output with each clock.
tm s=1
tm s=0
The TAP controller
Reset
Idle
tm s=0
tm s=1
tm s=1
tm s=0
tm s=1
Capture-DR
Update-DR
Pause-DR
DR-Scan
Exit1-DR
Exit2-DR
Shift-DR
tm s=1
tm s=1
tm s=0
tm s=0
tm s=1
tm s=0
tm s=0
tm s=0
tm s=0
tm s=1
tm s=1
tm s=1
tm s=0
tm s=1
© 2004-2011 SEGGER Microcontroller GmbH & Co. KG
Capture-IR
Update-IR
Pause-IR
IR-Scan
Exit1-IR
Exit2-IR
Shift-IR
tm s=0
tm s=0
tm s=1
tm s=0
tm s=1
tm s=1
tm s=0
tm s=0
tm s=0
tm s=1
tm s=1
189
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