AN2074 Freescale Semiconductor / Motorola, AN2074 Datasheet - Page 20

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

JTAG_BYPASS_SEQ:
20
BYPASS Example
TDO
Notice that when the least significant bit of data is shifted in, the output data is undefined. The least
significant bit is not shifted out until the next
most significant bit is shifted out when the Exit-DR state is entered. Table 6 lists the instructions used in
Example 11.
org
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
dc
, data shifted out on
B3
0
0
0
0
0
0
0
1
x:
$30
$30
$10
$10
$14
$14
$14
$34
$30
$30
$10
$10
$04
$14
$14
$14
$04
$14
$14
$14
$14
$14
$14
$14
$14
$14
$14
$14
B2
0
0
0
1
1
1
1
1
; go to Select DR
; go to Select IR
; go to Capture IR
; go to Shift IR
; go to Shift IR - TDI=1
; go to Shift IR - TDI=1
; go to Shift IR - TDI=1
; go to Exit IR
; go to Update IR
; go to Select DR
; go to Capture DR
; go to Shift DR
; go to Shift DR - TDI=0
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=0
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
; go to Shift DR - TDI=1
B1
TDO
0
0
1
0
0
1
1
1
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 6. BYPASS Example Instructions
is the same as the data shifted in on
B0
0
1
0
1
0
0
1
1
Example 11. BYPASS Example
DSP56300 JTAG Examples
- TDI=1
Go to: www.freescale.com
EXTEST
SAMPLE/PRELOAD
IDCODE
CLAMP
HIGHZ
ENABLE_ONCE
DEBUG_REQUEST
BYPASS
TCK
Instruction
TDO=x
TDO=0
TDO=1
TDO=1
TDO=1
TDO=0
TDO=1
TDO=1
TDO=1
TDO=1
TDO=1
TDO=1
TDO=1
TDO=1
TDO=1
TDO=1
cycle when Shift-DR is entered again. Similarly, the
TDI
Boundary-Scan Register
Boundary-Scan Register
ID Register
Bypass
Bypass
OnCE Register
OnCE Register
Bypass
in the previous Shift-DR state.
Register Selected