11th IEEE International On-Line Testing Symposium (2009)
June 24, 2009 to June 26, 2009
Jose Rocha , ISEL, Portugal
Nuno Dias , IST/INESC-ID, Portugal
Angelo Monteiro , IST/INESC-ID, Portugal
Alexandre Neves , IST/INESC-ID, Portugal
Gabriel Santos , SiliconGate, Portugal
Marcelino Santos , IST/INESC-ID, Portugal
J.P. Teixeira , IST/INESC-ID, Portugal
Observability is mandatory for debugging purposes in all microelectronic systems. Mixed signal cores, in particular, require high observability in order to allow post production debug and to drive the design enhancements towards the real non-ideal behaviour monitored in individual modules. Controllability is also a major advantage in the design-for-debug process. This work presents a low cost controllability and observability methodology that is evaluated in terms of area cost and bandwidth capability for different operating conditions. The proposed methodology is used to add debugging capability to a DCDC, a Charge Pump, a LDO and a Bandgap of a Power Management Unit..
A. Monteiro et al., "Controllability and observability in mixed signal cores," 11th IEEE International On-Line Testing Symposium(IOLTS), Sesimbra-Lisbon, Portugal, 2009, pp. 198-200.