BSDL Extensions for dot6. Michael Sberro JTAG course 2005. Agenda. Short Review Some BSR cells for dot6 Dot6 example device. Short Review. AC and DC tests are very common in dot6 since it does not separate digital & analog signals
JTAG course 2005
The AC_SelX cell captures the state of its “shift_In” line in the rising edge of the TCK
Mux, controlled by AC_mode pin to select between DC or AC extests;
XOR gate (captured sig., AC test sig.)
The designer marks pins as DC or AC to benefit from the dot6 extra test resources.
The drivers and receivers are determined by these I/O pins.
Diff., support Extests constant 1
AC coupled integrated on chip
Diff., hence can be AC/DC
G and H form a differential bidirectional pin pair