Cirrus Logic CS4970x4 - Manual (Page 88)

SDRAM Controller
CS4953x4/CS4970x4 System Designer’s Guide
DS810UM6 Copyright 2013 Cirrus Logic, Inc 5-3
5.1.3 Configuring SDRAM Parameters
Not all SDRAM manufacturers conform to the same timing specifications. Therefore, the CS4953x4/
CS4970x4 DSP must be configured to match the timing specifications for the SDRAM being used. All
SDRAM parameters are set in DSP Condenser at design time. See
Chapter 8, "DSP Condenser" .for more
details.
Refer to the External Memory Interface section in the CS4953x4/CS4970x4 datasheet for timing
parameters that are summarized in
Table 5-2 .
SD_A10 SDRAM Address 10 74 103 Output
SD_A11 SDRAM Address 11 56 85 Output
SD_A12 SDRAM Address 12 55 84 Output
SD_BA0
1 SDRAM Bank Address 0/Flash Address 13 75 104 Input
SD_BA1 1 SDRAM Bank Address 1/Flash Address 14 77 106 Input
SD_D0 SDRAM Bidirectional Data Bit 0 39 68 BiDir
SD_D1 SDRAM Bidirectional Data Bit 1 37 65 BiDir
SD_D2 SDRAM Bidirectional Data Bit 2 35 64 BiDir
SD_D3 SDRAM Bidirectional Data Bit 3 34 63 BiDir
SD_D4 SDRAM Bidirectional Data Bit 4 32 61 BiDir
SD_D5 SDRAM Bidirectional Data Bit 5 31 60 BiDir
SD_D6 SDRAM Bidirectional Data Bit 6 30 59 BiDir
SD_D7 SDRAM Bidirectional Data Bit 7 29 58 BiDir
SD_D8 SDRAM Bidirectional Data Bit 8 49 78 BiDir
SD_D9 SDRAM Bidirectional Data Bit 9 48 77 BiDir
SD_D10 SDRAM Bidirectional Data Bit 10 46 75 BiDir
SD_D11 SDRAM Bidirectional Data Bit 11 45 74 BiDir
SD_D12 SDRAM Bidirectional Data Bit 12 43 72 BiDir
SD_D13 SDRAM Bidirectional Data Bit 13 42 71 BiDir
SD_D14 SDRAM Bidirectional Data Bit 14 41 70 BiDir
SD_D15 SDRAM Bidirectional Data Bit 15 40 69 BiDir
1. For 16-Mbit parts SD_BA0 is used as a bank select. For 64-Mbit and 128-Mbit parts SD_BA[1:0] is the 2-bit
bank select.
Table 5-1. SDRAM Interface Signals (Continued)
Signal Name Signal Description
LQFP-144
Pin #
LQFP-128
Pin #
Pin Type