- Assuming the SLIMP3 is still supported by Logitech Media Player (Successor to Squeezebox)
Differences:
- SLIMP3 has 128x8bit buffer chip, write position directly controlled by the server
- Microchip IRB has 2 x (SPI) N256S0830HDA 32KByte SDRAM ICs, one of which is the MP3 decoder IC buffer
- We will assume we do a drop in replacement of 1 x N256S0830HDA with a Microchip SPI 23LC1024 1MBit SDRAM IC
- Possible SPI library change for that replaced IC
- N256S0830HDA = 3.0 to 3.6v
- 23LC1024 = 2.5 to 5.5v
- Look pin compatible (enough)
- Commands & modes look identical, except is 24 bit address for 23LC1024 vs 16 bit for N256S0830HDA
- Word length: N256S0830HDA regiter bit 5 toggle between 8 & 16 bit words, 23LC1024 is always 8 bit
- We ignore 23LC1024 SDI SQI modes for this application
UPDATE: V2 IRB BOM shows SDRAM ICs as being 23K256-I/SN (SN is SOIC 3.90mm narrow body) looks compatible with N256S0830HDA
We will need 23LC1024 SN
SDRAM IC Pins
