ds96-039wdsp ETC-unknow, ds96-039wdsp Datasheet - Page 80

• Manufacturer Part Number: ds96-039wdsp
• Description: Clarification Serial Control Register Description Dsp1620/27/28/29 Devices
• Manufacturer: ETC-unknow

DSP1628 Digital Signal Processor
7 Mask-Programmable Options
The DSP1628 contains a ROM that is mask-programmable. The selection of several programmable features is
made when a custom ROM is encoded. These features select the input clock options, the instruction/coefficient
memory map option, and the hardware emulation or ROM security option, as summarized in Table 63.
Table 63. DSP1628 ROM Options
* 1628hds.v # (# indicates the current version number) is the relocatable HDS object code. It uses approximately 140 words
† crc16.v # is the cyclic redundancy check object code. It uses approximately 75 words and must reside in the first 4 Kwords
7.1 Input Clock Options
For all input options, the input clock CKI can run at some fraction of the internal clock frequency by setting the PLL
multiplication factors appropriately (see Section 4.13, Clock Synthesis). When the PLL is bypassed, the input clock
CKI frequency is the internal clock frequency.
7.2 Memory Map Options
The DSP1628 offers a DSP1628x16 or a DSP1628x08 where the difference is in the memory maps. The
DSP1628x16 contains 16 Kwords of internal RAM (DPRAM). The DSP1628x08 supports the use of only 8 Kwords
of DPRAM. See Section 4.4 Memory Maps and Wait-States for further description.
7.3 ROM Security Options
The DSP1600 hardware development system (HDS) provides on-chip in-circuit emulation and requires that the re-
locatable HDS code be linked to the application code. This code's object file is called 1628hds.v # , where # is a
unique version identifier. Refer to the DSP1628-ST software tools release for more specific information. If on-chip
in-circuit emulation is desired, a nonsecure ROM must be chosen. If ROM security is desired with the DSP1628, the
HDS cannot be used. To provide testing of the internal ROM contents on a secure ROM device, a cyclic redundancy
check (CRC) program is called by and linked with the user's source code. The CRC code resides in the first
4 Kwords of ROM.
See the DSP1600 Support Tools Manual for more detailed information.
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and must reside in the first 4 Kwords of ROM.
of ROM. See the DSP1600 Support Tools Manual for detailed information.
ROM Security
Memory Map
Input Clock
Features
DSP1628x16
DSP1628x08
CMOS Level
Small Signal
Nonsecure
Options
Secure
Specify and link 1628hds.v # *,
Specify and link crc16.v #
no emulation capability.
16 Kwords DPRAM
8 Kwords DPRAM
allows emulation.
Comments
2.7 V
2.7 V
Lucent Technologies Inc.
February 1997
†
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