MCIMX6D4AVT10AC Freescale Semiconductor, MCIMX6D4AVT10AC Datasheet - Page 71

• Manufacturer Part Number: MCIMX6D4AVT10AC
• Description: Processors - Application Specialized i.MX6D
• Manufacturer: Freescale Semiconductor
• Type: Multimedia Applicationsr

Specifications of MCIMX6D4AVT10AC

• Rohs: yes
• Core: ARM Cortex A9
• Processor Series: i.MX6
• Data Bus Width: 32 bit
• Operating Supply Voltage: 1.05 V to 1.5 V
• Memory Type: L1/L2 Cache, ROM, SRAM

Figure 38
Synchronous mode, the typical value of tDQSQ is 0.85 ns (max) and 1 ns (max) for tQHS at 200MB/s.
GPMI will sample NAND_DATA[7:0] at both rising and falling edge of a delayed NAND_DQS signal,
which can be provided by an internal DPLL. The delay value can be controlled by GPMI register
GPMI_READ_DDR_DLL_CTRL.SLV_DLY_TARGET (see the GPMI chapter of the i.MX
6Dual/6Quad reference manual (IMX6DQRM)). Generally, the typical delay value of this register is equal
to 0x7 which means 1/4 clock cycle delay expected. However, if the board delay is large enough and
cannot be ignored, the delay value should be made larger to compensate the board delay.
Freescale Semiconductor
1
2
NF18 NAND_CEx_B access time
NF19 NAND_CEx_B hold time
NF20 Command/address NAND_DATAxx setup time
NF21 Command/address NAND_DATAxx hold time
NF22 clock period
NF23 preamble delay
NF24 postamble delay
NF25 NAND_CLE and NAND_ALE setup time
NF26 NAND_CLE and NAND_ALE hold time
NF27 NAND_CLK to first NAND_DQS latching transition
NF28 Data write setup
NF29 Data write hold
NF30 NAND_DQS/NAND_DQ read setup skew
NF31 NAND_DQS/NAND_DQ read hold skew
ID
The GPMI source synchronous mode output timing can be controlled by the module’s internal registers
GPMI_TIMING2_CE_DELAY, GPMI_TIMING_PREAMBLE_DELAY, GPMI_TIMING2_POST_DELAY. This AC timing depends
on these registers settings. In the table, CE_DELAY/PRE_DELAY/POST_DELAY represents each of these settings.
T = tCK (GPMI clock period) -0.075ns (half of maximum p-p jitter).
shows the timing diagram of NAND_DQS/NAND_DATAxx read valid window. For Source
i.MX 6Dual/6Quad Automotive and Infotainment Applications Processors, Rev. 2
Table 50. Source Synchronous Mode Timing Parameters
Parameter
Figure 38. NAND_DQS/NAND_DQ Read Valid Window
Symbol
tDQSS
tDQSQ
tPOST
tCALS
tCALH
tQHS
tCAS
tCAH
tPRE
tCE
tCH
tCK
tDS
tDH
POST_DELAY  T - 0.78 [see
PRE_DELAY  T - 0.29 [see
CE_DELAY  T - 0.79 [see
T = GPMI Clock Cycle
0.5  tCK - 0.63 [see
Min
—
—
0.25  tCK - 0.35
0.25  tCK - 0.85
0.5  tCK - 0.05
0.5  tCK - 1.23
0.5  tCK - 0.86
0.5  tCK - 0.37
T - 0.41 [see
Timing
—
1
Electrical Characteristics
2
]
Max
2.06
1.95
2
]
2
2
]
2
]
]
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
—
—
—
—
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