AM4376 datasheet(73/261 Pages) TI

73 / 261 page

AM4376, AM4377, AM4378, AM4379

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SPRS851B – JUNE 2014 – REVISED APRIL 2015

Table 4-28. DDR Signal Descriptions (continued)

SIGNAL NAME [1]

DESCRIPTION [2]

TYPE [3]

ZDN BALL [4]

ddr_d20

DDR SDRAM Data

ddr_d21

DDR SDRAM Data

ddr_d22

DDR SDRAM Data

ddr_d23

DDR SDRAM Data

ddr_d24

DDR SDRAM Data

ddr_d25

DDR SDRAM Data

ddr_d26

DDR SDRAM Data

ddr_d27

DDR SDRAM Data

AA3

ddr_d28

DDR SDRAM Data

AB2

ddr_d29

DDR SDRAM Data

AB1

ddr_d30

DDR SDRAM Data

AC1

ddr_d31

DDR SDRAM Data

AC2

ddr_dqm0

DDR Write Enable / Data Mask for Data[7:0]

ddr_dqm1

DDR Write Enable / Data Mask for Data[15:8]

ddr_dqm2

DDR Write Enable / Data Mask for Data[23:16]

ddr_dqm3

DDR Write Enable / Data Mask for Data[31:24]

ddr_dqs0

DDR Data Strobe for Data[7:0] (Differential+)

ddr_dqs1

DDR Data Strobe for Data[15:8] (Differential+)

ddr_dqs2

DDR Data Strobe for Data[23:16] (Differential+)

ddr_dqs3

DDR Data Strobe for Data[31:24] (Differential+)

AA1

ddr_dqsn0

DDR Data Strobe for Data[7:0] (Differential-)

ddr_dqsn1

DDR Data Strobe for Data[15:8] (Differential-)

ddr_dqsn2

DDR Data Strobe for Data[23:16] (Differential-)

ddr_dqsn3

DDR Data Strobe for Data[31:24] (Differential-)

AA2

ddr_nck

DDR SDRAM Clock (Differential-)

ddr_odt0

DDR SDRAM ODT0

ddr_odt1

DDR SDRAM ODT1

ddr_rasn

DDR SDRAM Row Address Strobe (Active Low)

ddr_resetn

DDR SDRAM RESET (only for DDR3)

ddr_vref

Voltage Reference

AP (1)

ddr_vtp

External Resistor for Impedance Training

I (2)

AC3

ddr_wen

DDR SDRAM Write Enable (Active Low)

(1) This terminal is an analog input used to set the switching threshold of the DDR input buffers to (VDDS_DDR / 2).

(2) This terminal is an analog passive signal that connects to an external 49.9 ohm 1%, 20mW reference resistor which is used to calibrate

the DDR input/output buffers.

Table 4-29. General-Purpose Memory Controller (GPMC) Signal Descriptions

SIGNAL NAME [1]

DESCRIPTION [2]

TYPE [3]

ZDN BALL [4]

gpmc_a0

GPMC Address

B22, C3

gpmc_a1

GPMC Address

A21, B23, C5

gpmc_a2

GPMC Address

A23, B21, C6

gpmc_a3

GPMC Address

A22, A4, C21

gpmc_a4

GPMC Address

A20, A24, D7

gpmc_a5

GPMC Address

B20, C10, E7

gpmc_a6

GPMC Address

C20, E8

gpmc_a7

GPMC Address

E19, F6

gpmc_a8

GPMC Address

B23, F7

Terminal Configuration and Functions

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