PM7384 FREEDM-84P672
DATA SHEET
PMC-1990445
ISSUE 5
FRAME ENGINE AND DATA LINK MANAGER 84P672
12
TEST FEATURES DESCRIPTION
The FREEDM-84P672 also supports a standard IEEE 1149.1 five signal JTAG
boundary scan test port for use in board testing. All device inputs may be read
and all device outputs may be forced via the JTAG test port.
12.1 Test Mode Registers
Test mode registers are used to apply test vectors during production testing of
the FREEDM-84P672. Production testing is enabled by asserting the PMCTEST
pin. During production tests, FREEDM-84P672 registers are selected by the
TA[12:0] pins. The address of a register on TA[12:0] is identical to the PCI offset
of that register when production testing is disabled (PMCTEST low). Read
accesses are enabled by asserting TRDB low while write accesses are enabled
by asserting TWRB low. Test mode register data is conveyed on the TDAT[15:0]
pins. Test mode registers (as opposed to normal mode registers) are selected
when TA[12]/TRS is set high.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
295
PMC [ PMC-SIERRA, INC ]
