Manual

SDRAM/Flash Controller Interface

CS4953xx Hardware User’s Manual

SD_RAS SDRAM Row Address Strobe 80 109 Output

SD_CAS

SDRAM Column Address Strobe 79 108 Output

SD_CS SDRAM Chip Select 81 110 Output

SD_DQM0 SDRAM Data Mask 0 28 57 Output

SD_DQM1 SDRAM Data Mask 1 50 79 Output

SD_WE

SDRAM Write Enable 78 107 Output

SD_A0/EXT_A0 SDRAM/Flash Address 0 72 102 Output

SD_A1/EXT_A1 SDRAM/Flash Address 1 71 101 Output

SD_A2/EXT_A2 SDRAM/Flash Address 2 70 99 Output

SD_A3/EXT_A3 SDRAM/Flash Address 3 68 97 Output

SD_A4/EXT_A4 SDRAM/Flash Address 4 67 96 Output

SD_A5/EXT_A5 SDRAM/Flash Address 5 64 93 Output

SD_A6//EXT_A6 SDRAM/Flash Address 6 62 91 Output

SD_A7/EXT_A7 SDRAM/Flash Address 7 61 90 Output

SD_A8/EXT_A8 SDRAM/Flash Address 8 59 88 Output

SD_A9/EXT_A9 SDRAM/Flash Address 9 58 87 Output

SD_A10/EXT_A10 SDRAM/Flash Address 10 74 103 Output

SD_A11/EXT_A11 SDRAM/Flash Address 11 56 85 Output

SD_A12/EXT_A12 SDRAM/Flash Address 12 55 84 Output

SD_BA0/EXT_A13

SDRAM Bank Address 0/Flash Address

75 104 Input

SD_BA1/EXT_A14

SDRAM Bank Address 1/Flash Address

77 106 Input

EXT_A15 Flash Address 15 82 111 Output

EXT_A16 Flash Address 16 84 113 Output

EXT_A17 Flash Address 17 85 114 Output

EXT_A18 Flash Address 18 87 116 Output

EXT_A19 Flash Address 19 88 117 Output

SD_D0/EXT_D0 SDRAM/Flash Bidirectional Data Bit 0 39 68 BiDir

SD_D1/EXT_D1 SDRAM/Flash Bidirectional Data Bit 1 37 65 BiDir

SD_D2/EXT_D2 SDRAM/Flash Bidirectional Data Bit 2 35 64 BiDir

Table 8-1. SDRAM Interface Signals (Continued)

Signal Name Signal Description

LQFP-144

Pin #

LQFP-128

Pin #

Pin Type