3 # SPD contents for APU 2GB DDR3 NO ECC (1333MHz PC1333) soldered down
4 # 0 Number of SPD Bytes used / Total SPD Size / CRC Coverage
5 # bits[3:0]: 1 = 128 SPD Bytes Used
6 # bits[6:4]: 1 = 256 SPD Bytes Total
7 # bit7 : 0 = CRC covers bytes 0 ~ 128
14 # 2 Key Byte / DRAM Device Type
15 # bits[7:0]: 0x0b = DDR3 SDRAM
18 # 3 Key Byte / Module Type
19 # bits[3:0]: 3 = SO-DIMM
20 # bits[3:0]: 8 = 72b-SO-DIMM
24 # 4 SDRAM CHIP Density and Banks
25 # bits[3:0]: 3 = 2 Gigabits Total SDRAM capacity per chip
26 # bits[3:0]: 4 = 4 Gigabits Total SDRAM capacity per chip
27 # bits[6:4]: 0 = 3 (8 banks)
32 # bits[2:0]: 1 = 10 Column Address Bits
33 # bits[5:3]: 4 = 16 Row Address Bits
34 # bits[5:3]: 3 = 15 Row Address Bits
35 # bits[5:3]: 2 = 14 Row Address Bits
39 # 6 Module Nominal Voltage, VDD
40 # bit0 : 0 = 1.5 V operable
41 # bit1 : 0 = NOT 1.35 V operable
42 # bit2 : 0 = NOT 1.25 V operable
46 # 7 Module Organization
47 # bits[2:0]: 1 = 8 bits
48 # bits[2:0]: 2 = 16 bits
49 # bits[5:3]: 0 = 1 Rank
53 # 8 Module Memory Bus Width
54 # bits[2:0]: 3 = Primary bus width is 64 bits
55 # bits[4:3]: 0 = 0 bits (no bus width extension)
56 # bits[4:3]: 1 = 8 bits (for ECC)
60 # 9 Fine Timebase (FTB) Dividend / Divisor
61 # bits[3:0]: 0x02 divisor
62 # bits[7:4]: 0x05 dividend
66 # 10 Medium Timebase (MTB) Dividend
67 # 11 Medium Timebase (MTB) Divisor
71 # 12 SDRAM Minimum Cycle Time (tCKmin)
72 # 0x0a = tCKmin of 1.25 ns = DDR3-1600 (800 MHz clock)
73 # 0x0c = tCKmin of 1.5 ns = DDR3-1333 (667 MHz clock)
74 # 0x0c = tCKmin of 1.5 ns = in multiples of MTB
80 # 14 CAS Latencies Supported, Least Significant Byte
81 # 15 CAS Latencies Supported, Most Significant Byte
82 # Cas Latencies of 11 - 5 are supported
85 # 16 Minimum CAS Latency Time (tAAmin)
86 # 0x6C = 13.5ns - DDR3-1333
87 # 0x69 = 13.125 ns - DDR3-1333
90 # 17 Minimum Write Recovery Time (tWRmin)
91 # 0x78 = tWR of 15ns - All DDR3 speed grades
94 # 18 Minimum RAS# to CAS# Delay Time (tRCDmin)
95 # 0x6E = 13.5ns - DDR3-1333
96 # 0x69 = 13.125 ns - DDR3-1333
99 # 19 Minimum Row Active to Row Active Delay Time (tRRDmin)
105 # 20 Minimum Row Precharge Delay Time (tRPmin)
107 # 0x69 = 13.125 ns - DDR3-1333
110 # 21 Upper Nibbles for tRAS and tRC
111 # bits[3:0]: tRAS most significant nibble = 1 (see byte 22)
112 # bits[7:4]: tRC most significant nibble = 1 (see byte 23)
115 # 22 Minimum Active to Precharge Delay Time (tRASmin), LSB
116 # 0x120 = 36ns - DDR3-1333 (see byte 21)
117 # 0x120 = 36ns - DDR3
120 # 23 Minimum Active to Active/Refresh Delay Time (tRCmin), LSB
121 # 0x289 = 49.125ns - DDR3-1333
124 # 24 Minimum Refresh Recovery Delay Time (tRFCmin), LSB
125 # 25 Minimum Refresh Recovery Delay Time (tRFCmin), MSB
126 # 0x500 = 160ns - for 2 Gigabit chips
127 # 0x820 = 260ns - for 4 Gigabit chips
130 # 26 Minimum Internal Write to Read Command Delay Time (tWTRmin)
131 # 0x3c = 7.5 ns - All DDR3 SDRAM speed bins
134 # 27 Minimum Internal Read to Precharge Command Delay Time (tRTPmin)
135 # 0x3c = 7.5ns - All DDR3 SDRAM speed bins
138 # 28 Upper Nibble for tFAWmin
139 # 29 Minimum Four Activate Window Delay Time (tFAWmin)
140 # 0x00F0 = 30ns - DDR3-1333, 1 KB page size
143 # 30 SDRAM Optional Feature
144 # bit0 : 1= RZQ/6 supported
145 # bit1 : 1 = RZQ/7 supported
146 # bits[6:2]: reserved
147 # bit7 : 1 = DLL Off mode supported
150 # 31 SDRAM Thermal and Refresh Options
151 # bit0 : 1 = Temp up to 95c supported
152 # bit1 : 0 = 85-95c uses 2x refresh rate
153 # bit2 : 1 = Auto Self Refresh supported
154 # bit3 : 0 = no on die thermal sensor
155 # bits[6:4]: reserved
156 # bit7 : 0 = partial self refresh supported
159 # 32 Module Thermal Sensor
160 # 0 = Thermal sensor not incorporated onto this assembly
163 # 33 SDRAM Device Type
164 # bits[1:0]: 0 = Signal Loading not specified
165 # bits[3:2]: reserved
166 # bits[6:4]: 0 = Die count not specified
167 # bit7 : 0 = Standard Monolithic DRAM Device
170 # 34 Fine Offset for SDRAM Minimum Cycle Time (tCKmin)
173 # 35 Fine Offset for Minimum CAS Latency Time (tAAmin)
176 # 36 Fine Offset for Minimum RAS# to CAS# Delay Time (tRCDmin)
179 # 37 Fine Offset for Minimum Row Precharge Delay Time (tRPmin)
182 # 38 Fine Offset for Minimum Active to Active/Refresh Delay (tRCmin)
196 00 00 00 00 00 00 00 00
201 # 60 Raw Card Extension, Module Nominal Height
202 # bits[4:0]: 0 = <= 15mm tall
203 # bits[7:5]: 0 = raw card revision 0-3
206 # 61 Module Maximum Thickness
207 # bits[3:0]: 0 = thickness front <= 1mm
208 # bits[7:4]: 0 = thinkness back <= 1mm
211 # 62 Reference Raw Card Used
212 # bits[4:0]: 0 = Reference Raw card A used
213 # bits[6:5]: 0 = revision 0
214 # bit7 : 0 = Reference raw cards A through AL
218 # 63 Address Mapping from Edge Connector to DRAM
219 # bit0 : 0 = standard mapping (not mirrored)
220 # bits[7:1]: reserved
224 00 00 00 00 00 00 00 00
227 00 00 00 00 00 00 00 00
230 00 00 00 00 00 00 00 00
233 00 00 00 00 00 00 00 00
235 # 96 - 103 (reserved)
236 00 00 00 00 00 00 00 00
238 # 104 - 111 (reserved)
239 00 00 00 00 00 00 00 00
241 # 112 - 116 (reserved)
244 # 117 - 118 Module ID: Module Manufacturers JEDEC ID Code
248 # 119 Module ID: Module Manufacturing Location - OEM specified
251 # 120 Module ID: Module Manufacture Year in BCD
255 # 121 Module ID: Module Manufacture week
259 # 122 - 125: Module Serial Number
262 # 126 - 127: Cyclical Redundancy Code