AN2074 Freescale Semiconductor / Motorola, AN2074 Datasheet - Page 10

• Manufacturer Part Number: AN2074
• Description: DSP56300 JTAG Examples
• Manufacturer: Freescale Semiconductor / Motorola

1.7 TAP Signals Example
10
TAP Signals Example
Table 4 describes the signals used in the TAP example and Figure 4 shows a typical sequence of signal
events for loading the BYPASS instruction 1111 into the Instruction Register.
Step 0
Steps 1-5
Step 6
Step 7
Step 8
Step 9
Step 10
Step 11
Step 12
Step 13
Step 14
Step 15
Step 16
Step 17
Step 18
Step 19
Step 20
Step 21
Step 22
Step 23
Transition
TCK
Assert
Set
Set
Set
Set
Set
TDO
Set
Bit 0 of Instruction Register shifted out on
Bit 0 of new instruction shifted in on
Bit 1 of Instruction Register shifted out on
Bit 1 of new instruction shifted in on
Bit 2 of Instruction Register shifted out on
Bit 2 of new instruction shifted in on
Bit 3 of Instruction Register shifted out on
Bit 3 of new instruction shifted in on
Bit 0 of new Instruction Register shifted out on
Set
TDO
Set
TMS
TMS
TMS
TMS
TMS
TMS
TMS
TMS
Freescale Semiconductor, Inc.
Table 4. TAP Signals Example Description
goes active with undefined data.
goes high impedance.
TRST
For More Information On This Product,
to 1 for 5
to 0 to enter Run-Test/Idle state.
to 1 to enter Select-DR state.
to 1 to enter Select-IR state.
to 0 to enter Capture-IR state.
to 0 to enter Shift-IR state.
to 1 to enter Update-IR state.
to 0 to return to Run-Test/Idle state.
DSP56300 JTAG Examples
.
Go to: www.freescale.com
TCK cycle
s to enter Test-Logic-Reset state.
Description
TDI
TDI
TDI
TDI
.
.
.
. Set
TDO
TDO
TDO
TDO
TMS
TDO
.
.
.
.
to 1 to enter Exit-IR state.
.