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EP1K50 数据表(PDF) 42 Page - Altera Corporation |
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EP1K50 数据表(HTML) 42 Page - Altera Corporation |
42 / 86 page 42 Altera Corporation ACEX 1K Programmable Logic Device Family Data Sheet IEEE Std. 1149.1 (JTAG) Boundary-Scan Support All ACEX 1K devices provide JTAG BST circuitry that complies with the IEEE Std. 1149.1-1990 specification. ACEX 1K devices can also be configured using the JTAG pins through the ByteBlasterMV or BitBlaster download cable, or via hardware that uses the JamTM Standard Test and Programming Language (STAPL), JEDEC standard JESD-71. JTAG boundary-scan testing can be performed before or after configuration, but not during configuration. ACEX 1K devices support the JTAG instructions shown in Table 14. The instruction register length of ACEX 1K devices is 10 bits. The USERCODE register length in ACEX 1K devices is 32 bits; 7 bits are determined by the user, and 25 bits are pre-determined. Tables 15 and 16 show the boundary-scan register length and device IDCODE information for ACEX 1K devices. Table 14. ACEX 1K JTAG Instructions JTAG Instruction Description SAMPLE/PRELOAD Allows a snapshot of signals at the device pins to be captured and examined during normal device operation and permits an initial data pattern to be output at the device pins. EXTEST Allows the external circuitry and board-level interconnections to be tested by forcing a test pattern at the output pins and capturing test results at the input pins. BYPASS Places the 1-bit bypass register between the TDI and TDO pins, allowing the BST data to pass synchronously through a selected device to adjacent devices during normal operation. USERCODE Selects the user electronic signature (USERCODE) register and places it between the TDI and TDO pins, allowing the USERCODE to be serially shifted out of TDO. IDCODE Selects the IDCODE register and places it between TDI and TDO, allowing the IDCODE to be serially shifted out of TDO. ICR Instructions These instructions are used when configuring an ACEX 1K device via JTAG ports using a MasterBlaster, ByteBlasterMV, or BitBlaster download cable, or a Jam File (.jam) or Jam Byte-Code File (.jbc) via an embedded processor. Table 15. ACEX 1K Boundary-Scan Register Length Device Boundary-Scan Register Length EP1K10 438 EP1K30 690 EP1K50 798 EP1K100 1,050 |
类似零件编号 - EP1K50 |
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类似说明 - EP1K50 |
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