AM4372 datasheet(73/266 Pages) TI1

73 / 266 page

AM4376, AM4377, AM4378, AM4379

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SPRS851C – JUNE 2014 – REVISED APRIL 2016

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Terminal Configuration and Functions

Table 4-27. DDR Signal Descriptions (continued)

SIGNAL NAME [1]

DESCRIPTION [2]

TYPE [3]

ZDN [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

Ω 1%, 20mW reference resistor which is used to calibrate the

DDR input/output buffers.

Table 4-28. General Purpose Memory Controller (GPMC) Signal Descriptions

SIGNAL NAME [1]

DESCRIPTION [2]

TYPE [3]

ZDN [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

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