------------------------------------------------------------------------------- -- TI SN74BCT8245A -- -- IEEE Std 1149.1 (JTAG) Boundary-Scan Test Device -- -- with Octal Bus Transceivers -- ------------------------------------------------------------------------------- -- *** This BSDL applies to device operating in B-to-A direction ONLY *** -- ------------------------------------------------------------------------------- -- Created by : Texas Instruments Incorporated -- -- Documentation : SN74BCT8245A Data Sheet (SCBS043) -- -- Product Status: Released to Production (RTP) -- -- BSDL revision : 1.1 -- -- BSDL status : Production -- -- Date created : 01/16/93 -- -- Last modified : 07/26/97 -- -- Modification history - -- -- - misc clean-up, cosmetic only -- ------------------------------------------------------------------------------- -- -- -- IMPORTANT NOTICE -- -- -- -- Texas Instruments (TI) reserves the right to make changes to its -- -- products or to discontinue any semiconductor product or service without -- -- notice, and advises its customers to obtain the latest version of -- -- relevant information to verify, before placing orders, that the -- -- information being relied on is current. -- -- -- -- TI warrants performance of its semiconductor products and related -- -- software to the specifications applicable at the time of sale in -- -- accordance with TI's standard warranty. Testing and other quality -- -- control techniques are utilized to the extent TI deems necessary to -- -- support this warranty. Specific testing of all parameters of each -- -- device is not necessarily performed, except those mandated by -- -- government requirements. -- -- -- -- Certain applications using semiconductor products may involve potential -- -- risks of death, personal injury, or severe property or environmental -- -- damage ("Critical Applications"). -- -- -- -- TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, INTENDED, AUTHORIZED, OR -- -- WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT APPLICATIONS, DEVICES -- -- OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. -- -- -- -- Inclusion of TI products in such applications is understood to be fully -- -- at the risk of the customer. Use of TI products in such applications -- -- requires the written approval of an appropriate TI officer. Questions -- -- concerning potential risk applications should be directed to TI through -- -- a local SC sales office. -- -- -- -- In order to minimize risks associated with the customer's applications, -- -- adequate design and operating safeguards should be provided by the -- -- customer to minimize inherent or procedural hazards. -- -- -- -- TI assumes no liability for applications assistance, customer product -- -- design, software performance, or infringement of patents or services -- -- described herein. Nor does TI warrant or represent that any license, -- -- either express or implied, is granted under any patent right, copyright, -- -- mask work right, or other intellectual property right of TI covering or -- -- relating to any combination, machine, or process in which such -- -- semiconductor products or services might be or are used. -- -- -- -- Copyright (c) 1997, Texas Instruments Incorporated -- -- -- ------------------------------------------------------------------------------- entity sn74bct8245a_ba is generic (PHYSICAL_PIN_MAP : string := "UNDEFINED"); port (DIR:in bit; A:out bit_vector(1 to 8); B:in bit_vector(1 to 8); OE_NEG:in bit; GND, VCC:linkage bit; TDO:out bit; TDI, TMS, 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 sn74bct8245a_ba : entity is PHYSICAL_PIN_MAP; constant JT : PIN_MAP_STRING := "DIR:1, A:(23,22,21," & "20,19,17,16,15), B:(2,3,4,5,7,8,9,10)," & "OE_NEG:24, GND:6, VCC:18, TDO:11, TMS:12," & "TCK:13, TDI:14"; constant DW : PIN_MAP_STRING := "DIR:1, A:(23,22,21," & "20,19,17,16,15), B:(2,3,4,5,7,8,9,10)," & "OE_NEG:24, GND:6, VCC:18, TDO:11, TMS:12," & "TCK:13, TDI:14"; constant NT : PIN_MAP_STRING := "DIR:1, A:(23,22,21," & "20,19,17,16,15), B:(2,3,4,5,7,8,9,10)," & "OE_NEG:24, GND:6, VCC:18, TDO:11, TMS:12," & "TCK:13, TDI:14"; constant FK : PIN_MAP_STRING := "DIR:9, A:(6,5,4,3,2," & "27,26,25), B:(10,11,12,13,16,17,18,19)," & "GND:14, VCC:28, TDO:20, TMS:21, TCK:23," & "OE_NEG:7, 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 sn74bct8245a_ba : entity is 8; attribute INSTRUCTION_OPCODE of sn74bct8245a_ba : entity is "EXTEST (00000000, 10000000), " & "BYPASS (11111111, 10000100, 00000101, 10001000, 00000001), " & "SAMPLE (00000010, 10000010), " & "INTEST (00000011, 10000011), " & "HIGHZ (00000110, 10000110), " & -- Bypass with outputs high-z "CLAMP (00000111, 10000111), " & -- Bypass with bs value "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 mode "TOPHIP (00001101, 10001101), " & -- Boundary toggle out test mode "SCANCN (00001110, 10001110), " & -- BCR scan normal mode "SCANCT (00001111, 10001111) " ; -- BCR scan test mode attribute INSTRUCTION_CAPTURE of sn74bct8245a_ba : entity is "10000001"; attribute INSTRUCTION_DISABLE of sn74bct8245a_ba : entity is "HIGHZ"; attribute INSTRUCTION_GUARD of sn74bct8245a_ba : entity is "CLAMP"; attribute REGISTER_ACCESS of sn74bct8245a_ba : entity is "BOUNDARY (EXTEST, SAMPLE, INTEST, READBN, READBT, CELLTST)," & "BYPASS (BYPASS, HIGHZ, CLAMP, RUNT, TOPHIP)," & "BCR[2] (SCANCN, SCANCT)" ; attribute BOUNDARY_CELLS of sn74bct8245a_ba : entity is "BC_1"; attribute BOUNDARY_LENGTH of sn74bct8245a_ba : entity is 18; attribute BOUNDARY_REGISTER of sn74bct8245a_ba : entity is "0 (BC_1, A(8), output3, X , 16, 1, Z)," & "1 (BC_1, A(7), output3, X , 16, 1, Z)," & "2 (BC_1, A(6), output3, X , 16, 1, Z)," & "3 (BC_1, A(5), output3, X , 16, 1, Z)," & "4 (BC_1, A(4), output3, X , 16, 1, Z)," & "5 (BC_1, A(3), output3, X , 16, 1, Z)," & "6 (BC_1, A(2), output3, X , 16, 1, Z)," & "7 (BC_1, A(1), output3, X , 16, 1, Z)," & "8 (BC_1, B(8), input, X)," & "9 (BC_1, B(7), input, X)," & "10 (BC_1, B(6), input, X)," & "11 (BC_1, B(5), input, X)," & "12 (BC_1, B(4), input, X)," & "13 (BC_1, B(3), input, X)," & "14 (BC_1, B(2), input, X)," & "15 (BC_1, B(1), input, X)," & "16 (BC_1, OE_NEG, input, X)," & -- Merged Input/Control "16 (BC_1, * , control, 1)," & "17 (BC_1, DIR , input, 0) " ; -- Sets direction B to A end sn74bct8245a_ba;