u-boot/include/spd.h

1 /* SPDX-License-Identifier: GPL-2.0+ */
38 	unsigned char clk_cycle2;  /* 23 Min SDRAM Cycle time at CL=X-1 */
39 	unsigned char clk_access2; /* 24 SDRAM Access from Clock at CL=X-1 */
40 	unsigned char clk_cycle3;  /* 25 Min SDRAM Cycle time at CL=X-2 */
41 	unsigned char clk_access3; /* 26 Max Access from Clock at CL=X-2 */
42 	unsigned char trp;         /* 27 Min Row Precharge Time (tRP)*/
43 	unsigned char trrd;        /* 28 Min Row Active to Row Active (tRRD) */
44 	unsigned char trcd;        /* 29 Min RAS to CAS Delay (tRCD) */
45 	unsigned char tras;        /* 30 Minimum RAS Pulse Width (tRAS) */  member
56 	unsigned char trc;         /* 41 Min Active to Auto refresh time tRC */
57 	unsigned char trfc;        /* 42 Min Auto to Active period tRFC */
62 	unsigned char res[15];     /* 47-xx IDD in SPD and Reserved space */
64 	unsigned char cksum;       /* 63 Checksum for bytes 0-62 */
65 	unsigned char mid[8];      /* 64 Mfr's JEDEC ID code per JEP-108E */