TMS320C6455
www.ti.com
SPRS276M –MAY 2005–REVISED MARCH 2012
Table 2-3. Terminal Functions (continued)
SIGNAL
TYPE
(1)
IPD/IPU
(2)
DESCRIPTION
NAME NO.
AED21 AD29
AED20 AJ28
AED19 AF29
AED18 AH28
AED17 AE29
AED16 AG28
AED15 AF28
AED14 AH26
AED13 AE28
AED12 AE26
AED11 AD26
I/O/Z IPU EMIFA external data
AED10 AF27
AED9 AG27
AED8 AD27
AED7 AE25
AED6 AJ27
AED5 AJ26
AED4 AE27
AED3 AG25
AED2 AH27
AED1 AF25
AED0 AD25
DDR2 MEMORY CONTROLLER (32-BIT) - CONTROL SIGNALS COMMON TO ALL TYPES OF MEMORY
DDR2 Memory Controller memory space enable. When the DDR2 Memory
DCE0 E14 O/Z
Controller is enabled, it always keeps this pin low.
DBA2 E15 O/Z
DBA1 D15 O/Z DDR2 Memory Controller bank address control
DBA0 C15 O/Z
DDR2CLKOUT B14 O/Z DDR2 Memory Controller output clock (CLKIN2 frequency × 10)
DDR2CLKOUT A14 O/Z Negative DDR2 Memory Controller output clock (CLKIN2 frequency × 10)
DSDCAS D13 O/Z DDR2 Memory Controller SDRAM column-address strobe
DSDRAS C13 O/Z DDR2 Memory Controller SDRAM row-address strobe
DSDWE B13 O/Z DDR2 Memory Controller SDRAM write-enable
DSDCKE D14 O/Z DDR2 Memory Controller SDRAM clock-enable (used for self-refresh mode)
DEODT1 A17 O/Z On-die termination signals to external DDR2 SDRAM. These pins should not be
connected to the DDR2 SDRAM.
Note: There are no on-die termination resistors implemented on the C6455
DEODT0 E16 O/Z
DSP die.
DSDDQGATE3 F21 I
DDR2 Memory Controller data strobe gate [3:0]
DSDDQGATE2 E21 O/Z
For hookup of these signals, see the Implementing DDR2 PCB Layout on the
DSDDQGATE1 B9 I
TMS320C6455/5 application report (literature number SPRAAA7).
DSDDQGATE0 A9 O/Z
DSDDQM3 C23 O/Z DDR2 Memory Controller byte-enable controls
• Decoded from the low-order address bits. The number of address bits or
DSDDQM2 C20 O/Z
byte enables used depends on the width of external memory.
DSDDQM1 C8 O/Z
• Byte-write enables for most types of memory.
DSDDQM0 C11 O/Z
• Can be directly connected to SDRAM read and write mask signal (SDQM).
Copyright © 2005–2012, Texas Instruments Incorporated Device Overview 33
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