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Scan Chain的原理与实现(实践)-top down flow
阅读量:597 次
发布时间:2019-03-12

本文共 1612 字,大约阅读时间需要 5 分钟。

???????????UG?????????DFT?????????????????????????????

????????????????????Top-Down Flow????DFT????????DFT???????ddc????????????????????

?????DC???

dc_shell

???????2read_design?

source 2read_design

???????

set hdlin_enable_rtldrc_info true;  # ??RTL????
# ???????
set test_simulation_library "./tmax/rams.v"
# ??????ORCA??
read_ddc mapped/ORCA.ddc
# ???????ORCA
current_design ORCA
# ????
link

????????3create_test_protocol?

source 3create_test_protocol

???????

# ??????????
# read_ddc mapped/ORCA.ddc
# ???????ORCA
current_design ORCA
# ???????
set test_simulation_library "../ref/tmax/libs.v"
# ??????
remove_test_protocol
# ????
set test_default_delay 0
set test_default_bidir_delay 0
set test_default_strobe 40
# ??????
set_dft_signal -view existing_dft -type ScanClock -timing { 45 55 } -port { pclk sdr_clk sys_clk }
set_dft_signal -view existing_dft -port prst_n -type Reset -active_state 0
set_dft_signal -view existing_dft -port scan_en -type ScanEnable -active_state 1
# ??????
set_dft_signal -view existing_dft -type Constant -active_state 1 -port test_modeset_dft_signal
set_dft_signal -view existing_dft -type Constant -active_state 0 -port conf_ena
# ?????????
read_test_protocol -section test_setup ./scripts/test_setup.spf -verbose
write_test_protocol -output output.spf

?????????????spf????????????????pre-DFT??????????D1???????D3???????D1??????Mux???????????????????????????????internal pin???constant??????????????ATE???????????

D3??????????????????active?????????pin data?clock off???????????????????pindata??????????????????

??internal pin???constant?????????????????????????????????????????

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