Y4_DESC
SIG_EXPR_DECL_SINGLE(VPIG5, VPI18, VPI18_DESC, Y4_DESC);
SIG_EXPR_DECL_SINGLE(VPIG5, VPI24, VPI24_DESC, Y4_DESC);
SIG_EXPR_DECL_SINGLE(VPIG5, VPI30, VPI30_DESC, Y4_DESC);
SIG_EXPR_LIST_DECL_SINGLE(Y4, PWM5, PWM5, Y4_DESC);