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TMS320UC5402GGU Datasheet(PDF) 10 Page - Texas Instruments |
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TMS320UC5402GGU Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 63 page  TMS320UC5402 FIXED-POINT DIGITAL SIGNAL PROCESSOR SPRS096A – APRIL 1999 – REVISED DECEMBER 1999 10 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443 memory The ’UC5402 device provides both on-chip ROM and RAM memories to aid in system performance and integration. on-chip ROM with bootloader The ’UC5402 features a 4K-word × 16-bit on-chip maskable ROM. Customers can arrange to have the ROM of the ’UC5402 programmed with contents unique to any particular application. A security option is available to protect a custom ROM. This security option is described in the TMS320C54x DSP CPU and Peripherals Reference Set, Volume 1 (literature number SPRU131). Note that only the ROM security option, and not the ROM/RAM option, is available on the ’UC5402 . A bootloader is available in the standard ’UC5402 on-chip ROM. This bootloader can be used to automatically transfer user code from an external source to anywhere in the program memory at power up. If the MP/MC pin is sampled low during a hardware reset, execution begins at location FF80h of the on-chip ROM. This location contains a branch instruction to the start of the bootloader program. The standard ’UC5402 bootloader provides different ways to download the code to accomodate various system requirements: D Parallel from 8-bit or 16-bit-wide EPROM D Parallel from I/O space 8-bit or 16-bit mode D Serial boot from serial ports 8-bit or 16-bit mode D Host-port interface boot The standard on-chip ROM layout is shown in Table 1. Table 1. Standard On-Chip ROM Layout† ADDRESS RANGE DESCRIPTION F000h – F7FFh Reserved F800h – FBFFh Bootloader FC00h – FCFFh µ-law expansion table FD00h – FDFFh A-law expansion table FE00h – FEFFh Sine look-up table FF00h – FF7Fh Reserved FF80h – FFFFh Interrupt vector table † In the ’UC5402 ROM, 128 words are reserved for factory device-testing purposes. Application code to be implemented in on-chip ROM must reserve these 128 words at addresses FF00h–FF7Fh in program space. on-chip RAM The ’UC5402 device contains 16K × 16-bit of on-chip dual-access RAM (DARAM). The DARAM is composed of two blocks of 8K words each. Each block in the DARAM can support two reads in one cycle, or a read and a write in one cycle. The DARAM is located in the address range 0080h–3FFFh in data space, and can be mapped into program/data space by setting the OVLY bit to 1. |
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