CSEE E6861y Handout #27a Prof. Steven Nowick 3/24/16 ERRATA (error corrections) AND CLARIFICATIONS for Tiwari et al. paper, "Technology Mapping for Low Power" (DAC-93), Handout #27 ====================================================================== 1. ERROR FIX: The paper has a *typo*, in section 2.2, in the formula for 'the power consumed by a gate g'. It uses 'p_g' instead of 'p_t'. CORRECTED FORMULA (as also presented in class): P_g = k x (C_INTg + C_LOAD) x p_t (not: P_g = k x (C_INTg + C_LOAD) x p_g) 2. CLARIFICATIONS: (a) The authors use: (lower-case) p_g, to mean 'signal probability of gate g' (*upper*-case) P_g, to mean 'power consumed by gate g' (b) Also, while the formula for power consumed by a gate g is: P_g = k x (C_INTg + C_LOAD) x p_t, the detailed examples assume k = 1 and C_LOAD = 0 for simplicity. Likewise, while the formula for signal transition probability p_t of a gate g, with signal probability p_g, is: p_t = 2 * p_g (1 - p_g), the authors omit the '2' coefficient for simplicity in the examples: p_g (1 - p_g). ======================================================================