Hello,
I must modify a design and I have some questions.
The previous design was composed of two DSP28335 and one external Dual Port static RAM "cypress série CY7C024AV/025AV/026AV), the two DSP exchange information by reading and writing in this external DPRAM.
(Refer to the datasheet http://www.cypress.com/?docID=38748 for external DPRAM)
(For summary, the DSP A reads and writes on the memory, generates an interrupt on DSP B by writing on a specific address of the memory. On this interrupt, the DSP B reads and writes on the memory, generates an interrupt on DSP A.... and so on)
The design which I must done, is composed of one DSP28335, one CONCERTO F28M35H52 and this same external memory. The CONCERTO must use the same signals of the external memory (INT, R/nW, and CE for both DSP).
My questions are:
- Is it possible to generate the R/nW signal of the cypress component with the RD signal of EPI? (because the CONCERTO have one RD signal and one WR signal instead of one R/nW signal on DSP28335)
- Do you think that the CONCERTO can write and read on the cypress memory correctly ? (because I don't understand really how work the EPI of the CONCERTO, i don't find the LEAD, ACTIVE and TRAIL time as in the DSP28335).
I specify that I want a 16 bit data, a 12 bit address, so, i think i need :
EPI CONFIG REG. MODE = HB-16
HP16 CONFIG REG.MODE = NOMUX
HP16 CONFIG REG.BSEL= NO
HP16 CONFIG2 REG.CSCFG = 1CS
Thanks in advance for your Help
