[[vendor:yamaha]]
 
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vendor:yamaha [2017/04/25 13:34]
mcmaster 		vendor:yamaha [2020/10/01 01:25] (current)
lord_nightmare new style 'A' datecode is almost certainly Yamaha's own Kagoshima Fab
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 LN has observed (not sure if always true): "cmos...yamaha part starts with a 3 (nmos parts start with 2)" LN has observed (not sure if always true): "cmos...yamaha part starts with a 3 (nmos parts start with 2)"
 +
 +According to Tiido and others, Yamaha is a fabless vendor, and has other chip manufacturers do all of their silicon fabrication and packaging. Examples being Fujitsu, Sharp, Hitachi, ROHM.
 +
 +====== Getting Started ======
 +[[vendor:yamaha:FM|FM Theory]]
 +
 +[[vendor:yamaha:OPL2|OPL2]]
  
  
 ====== Datecode ====== ====== Datecode ======
  
-  "A quick lesson in yamaha datecodes: (not sure if the cutoff was 1989, 1990 or 1991 but its one of those) +  Yamaha Datecode/Markings: 
-  Pre cutoff: yl ww LL r +  1981-1989 'old style': (may have been used very briefly in 1990) 
-  Post cutoff: Yyww LLlr+  ym dd Ll r 
 +  m = month (1-9 = Jan-Sep, X=oct, Y=nov, Z=dec) 
 +  dd = day within month 
 +  L might be a manufacturer code, but could also be the msb of the lot code? 
 +   
 +  1990+ 'new style': 
 +  Yyww MLlr
   Y = year most significant (9 or 0 or 1 for 199x or 200x or 201x)   Y = year most significant (9 or 0 or 1 for 199x or 200x or 201x)
-  y = year least significant (2 = 1982, 3 = 1983 ... etc ... 9 = 1989) (0 = 1990 for only chips pre-cutoff?) +  y = year least significant (2 = 1982, 3 = 1983 ... etc ... 9 = 1989) (0 = 1990?)
-  LLl = lot code/batch code?+
   ww = week within year   ww = week within year
-  r = die revision" +  M = Manufacturer code, see table below; old style and new style chips have different tables 
 +  Ll = lot code/batch code? 
 +  r = die revision 
 + 
 + 
 +====== Fabs ======
  
 +  'new style':
 +  A = Yamaha (Kagoshima)
 +  C = Hitachi 2a
 +  D =
 +  E = Hitachi 1
 +  F = Fujitsu
 +  G = Hitachi 1a?
 +  H = Sharp 1
 +  I (= 5) = Sharp (95% certain)
 +  L (= 4) = Hitachi 2
 +  O =
 +  Z = Fujitsu 2
  
 ====== Chips ====== ====== Chips ======
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 Sega parts by yamaha: Sega parts by yamaha:
 YM2602B     315-5124    SDIP        6                           B               1987 YM2602B     315-5124    SDIP        6                           B               1987
-8045B       315-5308    QFP         Z                           B               1989 +YM6045B     315-5308    QFP         Z                           B               1989 
-8048        315-5309    QFP         X, Y, L?                    C               1988-1991+YM6048      315-5309    QFP         X, Y, L?                    C               1988-1991
 YM7101      315-5313    QFP         4, A, E, H, L, O, X, Y      C, D, E         1989-1991 YM7101      315-5313    QFP         4, A, E, H, L, O, X, Y      C, D, E         1989-1991
 FC1001      315-5313A   QFP         H, L                        C               1992 FC1001      315-5313A   QFP         H, L                        C               1992
-8045C       315-5364    QFP         A                           D               1992+YM6045C     315-5364    QFP         A                           D               1992
 ?           315-5402 ?           315-5402
 ?           315-5433    QFP NO YAMAHA STYLE MARKING                             1991 ?           315-5433    QFP NO YAMAHA STYLE MARKING                             1991
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 FJ3002      315-5960    QFP         C                           F               1996 FJ3002      315-5960    QFP         C                           F               1996
  
- 
- 
-Index: 
 Package codes: Package codes:
 D = NDIP/DIP D = NDIP/DIP
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 F = QFP (sometimes soic, mismarked?) F = QFP (sometimes soic, mismarked?)
 S = QFP44 S = QFP44
- 
-Manufacturers/Fabs: 
-oldstyle: 
-1 =  
-2 = Sharp? 
-3 = 
-4 = L = Hitachi 2 
-5 = Sharp (NDIP) 
-6 = Hitachi 
-7 = 
-8 = Hitachi or ROHM (ndip)? 
-X = 
-Y = Hitachi? 
-newstyle: 
-A = Sharp 2 
-C = Hitachi 2 
-D = 
-E = Hitachi 1 
-F = Fujitsu 
-G = Hitachi 1 
-H = Sharp 1 
-I = Sharp (verified from multiple chips) 
-L = 4 = Hitachi 2 
-O = 
-both: 
-Z = Fujitsu 
- 
-Yamaha datecode format: 
-"Old style": 
-YM WW LL R 
- 
-"New style" 
-YYWW MLLR 
- 
-YY = last 2 digits of year 
-Y = last digit of year 
-WW = week 
-M = manufacturer or fab (code differs for old vs new style?) 
-LL = lotcode or production line? (numeric starting at 01 or AA?) 
-R = die revision 
- 
-YM2164s: 
-58 05 83 C = hitachi 
 </code> </code>
  
 
vendor/yamaha.1493127279.txt.gz · Last modified: 2017/04/25 13:34 by mcmaster
 
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