IMX8MNIEC datasheet(54/89 Pages) NXP

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i.MX 8M Nano Applications Processor Datasheet for Industrial Products, Rev. 0.1, 03/2020

54

NXP Semiconductors

Electrical characteristics

For DDR Toggle mode, Figure 29 shows the timing diagram of NAND_DQS/NAND_DATAxx read valid

window. The typical value of tDQSQ is 1.4 ns (max) and 1.4 ns (max) for tQHS at 133 MB/s. GPMI

samples NAND_DATA[7:0] at both the rising and falling edges of a delayed NAND_DQS signal, which

is provided by an internal DPLL. The delay value of this register can be controlled by the GPMI register

GPMI_READ_DDR_DLL_CTRL.SLV_DLY_TARGET (see the GPMI chapter of the i.MX 8M Nano

Applications Processor Reference Manual [IMX8MNRM]). Generally, the typical delay value is equal to

0x7, which means a 1/4 clock cycle delay is expected. But if the board delay is big enough and cannot be

ignored, the delay value should be made larger to compensate the board delay.

3.9.5

I2C bus characteristics

The Inter-Integrated Circuit (I2C) provides functionality of a standard I2C master and slave. The I2C is

designed to be compatible with the I2C Bus Specification, version 2.1, by Philips Semiconductor (now

NXP Semiconductors).

3.9.6

MIPI D-PHY timing parameters

MIPI D-PHY electrical specifications are compliance.

NF24 postamble delay

tPOST

POST_DELAY

 T + 0.43 [see

note2]

—ns

NF28 Data write setup

tDS5

0.25

 tCK - 0.32

—

ns

NF29 Data write hold

tDH5

0.25

 tCK - 0.79

—

ns

NF30 NAND_DQS/NAND_DQ read setup skew

tDQSQ6

—3.18

ns

NF31 NAND_DQS/NAND_DQ read hold skew

tQHS6

—3.27

ns

1

AS minimum value can be 0, while DS/DH minimum value is 1.

2 T = tCK (GPMI clock period) - 0.075 ns (half of maximum p-p jitter).

3 CE_DELAY represents HW_GPMI_TIMING2[CE_DELAY]. NF18 is guaranteed by the design. Read/Write operation is started

with enough time of ALE/CLE assertion to low level.

4 PRE_DELAY + 1

 (AS + DS)

5 Shown in Figure 30.

6 Shown in Figure 31.

Table 41. Toggle mode timing parameters (continued)

ID

Parameter

Symbol

Timing

T = GPMI Clock Cycle

Unit

Min.

Max.

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NXP Semiconductors	IMX8MNIEC	1Mb / 114P	i.MX 8M Nano Applications Processor Datasheet for Industrial Products Rev. 5, 09/2022
NXP Semiconductors	IMX8MNIEC	1Mb / 114P	i.MX 8M Nano Applications Processor Datasheet for Industrial Products Rev. 5, 09/2022

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