-------------------------------------------------------------------------------
-- TI SN74BCT8373A --
-- IEEE Std 1149.1 (JTAG) Boundary-Scan Test Device --
-- with Octal D-Type Latches --
-------------------------------------------------------------------------------
-- Created by : Texas Instruments Incorporated --
-- Documentation : SN74BCT8373A Data Sheet (SCBS044) --
-- Product Status: Released to Production (RTP) --
-- BSDL revision : 2.1 --
-- BSDL status : Production --
-- Date created : 05/01/94 --
-- Last modified : 07/26/97 --
-- Modification history - --
-- - misc clean-up, cosmetic only --
-------------------------------------------------------------------------------
-- --
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-------------------------------------------------------------------------------
entity sn74bct8373a is
generic (PHYSICAL_PIN_MAP : string := "UNDEFINED");
port (LE:in bit;
Q:out bit_vector(1 to 8);
D:in bit_vector(1 to 8);
GND, VCC:linkage bit;
OE_NEG:in bit;
TDO:out bit;
TMS, TDI, TCK:in bit;
NC:linkage bit_vector(1 to 4));
use STD_1149_1_1990.all; -- Get Standard attributes and definitions
attribute PIN_MAP of sn74bct8373a : entity is PHYSICAL_PIN_MAP;
constant JT : PIN_MAP_STRING := "LE:1, Q:(2,3,4,5,7,8, " &
"9,10), D:(23,22,21,20,19,17,16,15), " &
"GND:6, VCC:18, OE_NEG:24, TDO:11, " &
"TMS:12, TCK:13, TDI:14";
constant DW : PIN_MAP_STRING := "LE:1, Q:(2,3,4,5,7,8, " &
"9,10), D:(23,22,21,20,19,17,16,15), " &
"GND:6, VCC:18, OE_NEG:24, TDO:11, " &
"TMS:12, TCK:13, TDI:14";
constant NT : PIN_MAP_STRING := "LE:1, Q:(2,3,4,5,7,8, " &
"9,10), D:(23,22,21,20,19,17,16,15), " &
"GND:6, VCC:18, OE_NEG:24, TDO:11, " &
"TMS:12, TCK:13, TDI:14";
constant FK : PIN_MAP_STRING := "LE:9, Q:(10,11,12," &
"13,16,17,18,19), D:(6,5,4,3,2,27,26,25), " &
"GND:14, VCC:28, OE_NEG:7, TDO:20, " &
"TMS:21, TCK:23, TDI:24, NC:(1,8,15,22)";
attribute TAP_SCAN_IN of TDI : signal is true;
attribute TAP_SCAN_MODE of TMS : signal is true;
attribute TAP_SCAN_OUT of TDO : signal is true;
attribute TAP_SCAN_CLOCK of TCK : signal is (20.0e6, BOTH);
attribute INSTRUCTION_LENGTH of sn74bct8373a : entity is 8;
attribute INSTRUCTION_OPCODE of sn74bct8373a : entity is
"BYPASS (11111111, 10001000, 00000101, 10000100, 00000001), " &
"EXTEST (00000000, 10000000)," &
"SAMPLE (00000010, 10000010)," &
"INTEST (00000011, 10000011)," &
"HIGHZ (00000110, 10000110)," & -- Bypass with outputs high-z
"CLAMP (00000111, 10000111)," & -- Bypass with bs values
"RUNT (00001001, 10001001)," & -- Boundary run test
"READBN (00001010, 10001010)," & -- Boundary read normal mode
"READBT (00001011, 10001011)," & -- Boundary read test mode
"CELLTST(00001100, 10001100)," & -- Boundary selftest normal
"TOPHIP (00001101, 10001101)," & -- Boundary toggle out test
"SCANCN (00001110, 10001110)," & -- BCR scan normal
"SCANCT (00001111, 10001111)" ; -- BCR scan test
attribute INSTRUCTION_CAPTURE of sn74bct8373a : entity is "10000001";
attribute INSTRUCTION_DISABLE of sn74bct8373a : entity is "HIGHZ";
attribute INSTRUCTION_GUARD of sn74bct8373a : entity is "CLAMP";
attribute REGISTER_ACCESS of sn74bct8373a : entity is
"BOUNDARY (EXTEST, SAMPLE, INTEST, READBN, READBT, CELLTST)," &
"BYPASS (BYPASS, HIGHZ, CLAMP, RUNT, TOPHIP)," &
"BCR[2] (SCANCN, SCANCT)" ;
attribute BOUNDARY_CELLS of sn74bct8373a : entity is "BC_1";
attribute BOUNDARY_LENGTH of sn74bct8373a : entity is 18;
attribute BOUNDARY_REGISTER of sn74bct8373a : entity is
" 0 (BC_1, Q(8) ,output3, X, 16, 1, Z), " &
" 1 (BC_1, Q(7) ,output3, X, 16, 1, Z), " &
" 2 (BC_1, Q(6) ,output3, X, 16, 1, Z), " &
" 3 (BC_1, Q(5) ,output3, X, 16, 1, Z), " &
" 4 (BC_1, Q(4) ,output3, X, 16, 1, Z), " &
" 5 (BC_1, Q(3) ,output3, X, 16, 1, Z), " &
" 6 (BC_1, Q(2) ,output3, X, 16, 1, Z), " &
" 7 (BC_1, Q(1) ,output3, X, 16, 1, Z), " &
" 8 (BC_1, D(8) ,input , X)," &
" 9 (BC_1, D(7) ,input , X)," &
"10 (BC_1, D(6) ,input , X)," &
"11 (BC_1, D(5) ,input , X)," &
"12 (BC_1, D(4) ,input , X)," &
"13 (BC_1, D(3) ,input , X)," &
"14 (BC_1, D(2) ,input , X)," &
"15 (BC_1, D(1) ,input , X)," &
"16 (BC_1, OE_NEG,input , X)," & -- merged Input/Control cell
"16 (BC_1, * ,control, 1)," & -- merged Input/Control cell
"17 (BC_1, LE ,input , X) " ;
end sn74bct8373a;