7 * Serial Presence Detect Definitions Module
8 * SCCS identification: %I%
11 * Date newest applied delta was created (MM/DD/YY): %G%
12 * Time newest applied delta was created (HH:MM:SS): %U%
14 * Fully qualified SCCS file name:
17 * (C) COPYRIGHT MOTOROLA, INC. 1996
20 * 1. All data was taken from an IBM application note titled
21 * "Serial Presence Detect Definitions".
31 * serial PD byte assignment address map (256 byte EEPROM)
35 uchar n_bytes; /* 00 number of bytes written/used */
36 uchar t_bytes; /* 01 total number of bytes in serial PD device */
37 uchar fmt; /* 02 fundamental memory type (FPM/EDO/SDRAM) */
38 uchar n_row; /* 03 number of rows */
39 uchar n_col; /* 04 number of columns */
40 uchar n_banks; /* 05 number of banks */
41 uchar data_w_lo; /* 06 data width */
42 uchar data_w_hi; /* 07 data width */
43 uchar ifl; /* 08 interface levels */
44 uchar a_ras; /* 09 RAS access */
45 uchar a_cas; /* 0A CAS access */
46 uchar ct; /* 0B configuration type (non-parity/parity/ECC) */
47 uchar refresh_rt; /* 0C refresh rate/type */
48 uchar p_dram_o; /* 0D primary DRAM organization */
49 uchar s_dram_o; /* 0E secondary DRAM organization (parity/ECC-checkbits) */
50 uchar reserved[17]; /* 0F reserved fields for future offerings */
51 uchar ss_info[32]; /* 20 superset information (may be used in the future) */
52 uchar m_info[64]; /* 40 manufacturer information (optional) */
53 uchar unused[128]; /* 80 unused storage locations */
57 * memory type definitions
59 #define DIMM_MT_FPM 1 /* standard FPM (fast page mode) DRAM */
60 #define DIMM_MT_EDO 2 /* EDO (extended data out) */
61 #define DIMM_MT_PN 3 /* pipelined nibble */
62 #define DIMM_MT_SDRAM 4 /* SDRAM (synchronous DRAM) */
65 * row addresses definitions
67 #define DIMM_RA_RDNDNT (1<<7) /* redundant addressing */
68 #define DIMM_RA_MASK 0x7f /* number of row addresses mask */
71 * module interface levels definitions
73 #define DIMM_IFL_TTL 0 /* TTL/5V tolerant */
74 #define DIMM_IFL_LVTTL 1 /* LVTTL (not 5V tolerant) */
75 #define DIMM_IFL_HSTL15 2 /* HSTL 1.5 */
76 #define DIMM_IFL_SSTL33 3 /* SSTL 3.3 */
77 #define DIMM_IFL_SSTL25 4 /* SSTL 2.5 */
80 * DIMM configuration type definitions
82 #define DIMM_CT_NONE 0 /* none */
83 #define DIMM_CT_PARITY 1 /* parity */
84 #define DIMM_CT_ECC 2 /* ECC */
87 * row addresses definitions
89 #define DIMM_RRT_SR (1<<7) /* self refresh flag */
90 #define DIMM_RRT_MASK 0x7f /* refresh rate mask */
91 #define DIMM_RRT_NRML 0x00 /* normal (15.625us) */
92 #define DIMM_RRT_R_3_9 0x01 /* reduced .25x (3.9us) */
93 #define DIMM_RRT_R_7_8 0x02 /* reduced .5x (7.8us) */
94 #define DIMM_RRT_E_31_3 0x03 /* extended 2x (31.3us) */
95 #define DIMM_RRT_E_62_5 0x04 /* extended 4x (62.5us) */
96 #define DIMM_RRT_E_125 0x05 /* extended 8x (125us) */