AN2074 Freescale Semiconductor / Motorola, AN2074 Datasheet - Page 26

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

JTAG_SAMPLE_SEQ:
26
SAMPLE/PRELOAD Example
data reflects the sampled data on the DSP pins. Output data is stored in six memory locations
x:JTAG_OUT..x:JTAG_OUT+5. The most significant word is stored in x:JTAG_OUT and the least
significant word is stored in x:JTAG_OUT+5.
One way to verify that the sampled output data is correct is to compare the settings of the MODD–MODA
pins to the sampled output data. For example, if the DSP is set to Boot Mode 9 (MODD = 1, MODC = 0,
MODB = 0, MODA = 1), bits 3–0 of the sampled output data should have a value of 9, since
MODD–MODA are in bits 3–0 of the boundary scan register. Table 11 describes the instructions used in
Example 14.
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
B3
0
0
0
0
0
0
0
1
$30
$30
$10
$10
$14
$04
$04
$24
$30
$30
$10
$10
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
$04
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 - 1
; go to Shift IR - 0
; go to Shift IR - 0
; go to Exit IR
; go to Update IR
; go to Select DR
; go to Capture DR
; go to Shift DR
; go to Shift DR - lsb of data out MODA
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR - msb of data outD20
; go to Shift DR - lsb of data outD19
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR
; go to Shift DR - msb of data outD13
Table 11. SAMPLE/PRELOAD Example Instructions
B1
0
0
1
0
0
1
1
1
Freescale Semiconductor, Inc.
Example 14. SAMPLE/PRELOAD Example
For More Information On This Product,
B0
0
1
0
0
1
0
1
1
DSP56300 JTAG Examples
- 0
Go to: www.freescale.com
EXTEST
SAMPLE/PRELOAD
IDCODE
HIGHZ
CLAMP
ENABLE_ONCE
DEBUG_REQUEST
BYPASS
MODB
MODC
MODD
D23
D22
D21
D18
D17
D16
D15
ctrl D23:D12
D14
Instruction
Boundary-Scan Register
Boundary-Scan Register
ID Register
Bypass
Bypass
OnCE Register
OnCE Register
Bypass
Register Selected