数据搜索系统,热门电子元器件搜索 |
|
EP2A15 数据表(PDF) 27 Page - Altera Corporation |
|
EP2A15 数据表(HTML) 27 Page - Altera Corporation |
27 / 36 page Programming and Configuration File Support Page 27 Enhanced Configuration (EPC) Devices Datasheet January 2012 Altera Corporation The ISP circuitry in the EPC device is compliant with the IEEE Std. 1532 specification. The IEEE Std. 1532 is a standard that allows concurrent ISP between devices from multiple vendors. f For more information about the EPC device JTAG support, refer to the Configuration Devices BSDL Files page. EPC devices can also be programmed by third-party flash programmers or on-board processors using the external flash interface. Programming files (.pof) can be converted to a Hexadecimal (Intel-Format) File (.hexout) using the Quartus II Convert Programming Files utility, for use with the programmers or processors. Table 11. JTAG Instructions for EPC Devices (1) JTAG Instruction OPCODE Description SAMPLE/ PRELOAD 00 0101 0101 Allows a snapshot of the state of the EPC device pins to be captured and examined during normal device operation and permits an initial data pattern output at the device pins. EXTEST 00 0000 0000 Allows the external circuitry and board-level interconnections to be tested by forcing a test pattern at the output pins and capturing results at the input pins. BYPASS 11 1111 1111 Places the 1-bit bypass register between the TDI and TDO pins, which allow the BST data to pass synchronously through a selected device to adjacent devices during normal device operation. IDCODE 00 0101 1001 Selects the device IDCODE register and places it between TDI and TDO, allowing the device IDCODE to be serially shifted out to TDO. The device IDCODE for all EPC devices is the same and shown below: 0100A0DDh USERCODE 00 0111 1001 Selects the USERCODE register and places it between TDI and TDO, allowing the USERCODE to be serially shifted out the TDO. The 32-bit USERCODE is a programmable user-defined pattern. INIT_CONF 00 0110 0001 This function initiates the FPGA reconfiguration process by pulsing the nINIT_CONF pin low, which is connected to the FPGA nCONFIG pin. After this instruction is updated, the nINIT_CONF pin is pulsed low when the JTAG state machine enters Run-Test/Idle state. The nINIT_CONF pin is then released and nCONFIG is pulled high by the resistor after the JTAG state machine goes out of Run-Test/Idle state. The FPGA configuration starts after nCONFIG goes high. As a result, the FPGA is configured with the new configuration data stored in flash using ISP. This function can be added to your programming file (.pof, .jam, and .jbc) in the Quartus II software by enabling the Initiate configuration after programming option in the Programmer options window (Options menu). PENDCFG 00 0110 0101 This optional function can be used to hold the nINIT_CONF pin low during JTAG-based ISP of the EPC device. This feature is useful when the external flash interface is controlled by an external FPGA or processor. This function prevents contention on the flash pins when both the controller and external device try to access the flash simultaneously. Before the EPC device’s controller can access the flash memory, the external FPGA/processor needs to tri-state its interface to flash.This can be ensured by resetting the FPGA using the nINIT_CONF, which drives the nCONFIG pin and keeps the external FPGA or processor in the “reset” state. The nINIT_CONF pin is released when the initiate configuration (INIT_CONF) JTAG instruction is issued. Note to Table 11: (1) Instruction register length for the EPC device is 10 and boundary scan length is 174. |
类似零件编号 - EP2A15 |
|
类似说明 - EP2A15 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |