EMTOP SOM-IMX8M-MINI, Manual

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TF single on BTB connector: Connected to uSDHC2
On-board QSPI Flash: Connected to QSPI, 1.8V 64M bit QSPI flash, W25Q64FW
USDHC IO VOLTAGE
SELECTION For
Manufacture Mode
0 - 3.3V
1 - 1.8V
BOOT_CFG[14]
SD Loopback Clock
Source Sel (for SDR50
and SDR104 only)
'0' - through SD pad
'1' - direct
BOOT_CFG[10] BOOT_CFG[11] BOOT_CFG[12] BOOT_CFG[13] BOOT_CFG[15]
4
0x470[15:8] BOOT_CFG[8] BOOT_CFG[9]
5 6 7 0 2 3
Port Select:
00 - uSDHC1
01 - uSDHC2
10 - uSDHC3
Power Cycle Enable
'0' - No power cycle
'1' - Enabled via
Address 1
100 - QSPI
011 - NAND
Infinit-Loop
(Debug USE only)
0 - Disable
1 - Enable
010 - MMC/eMMC
001 - SD/eSD
SPI Addressing:
0 - 3-bytes (24-bit)
1 - 2-bytes (16-bit)
Port Select:
000 - eCSPI1
001 - eCSPI2
010 - eCSPI3
FLASH_TYPE
000-Device supports 3B read by default
001-Device supports 4B read by default
010-HyperFlash 1V8
011-HyperFlash 3V3
100-MXIC Octal DDR
Nand_Row_address_bytes:
00 - 3
01 - 2
10 - 4
11 - 5
Pages In Block:
00 - 128
01 - 64
10 - 32
11 - 256
110 - SPI NOR
0x470[15:8]
0x470[15:8]
Others - Reserved for future use
0x470[15:8]
0x470[15:8]
0x470[15:8]
0x470[15:8]
BOOT_CFG[4] BOOT_CFG[5] BOOT_CFG[7] BOOT_CFG[6]
Reserved
BOOT_CFG[0] BOOT_CFG[1] BOOT_CFG[2] BOOT_CFG[3]
BOOT_SEARCH_COUNT:
00 - 2
01 - 2
10 - 4
11 - 8
Bus Width:
000 - 1-bit
001 - 4-bit
010 - 8-bit
101 - 4-bit DDR (MMC 4.4)
110 - 8-bit DDR (MMC 4.4)
Else - reserved.
Fast Boot:
0 - Regular
1 - Fast Boot
Bus Width:
0 - 1-bit
1 - 4-bit
Speed
000 - Normal/SDR12
001 - High/SDR25
010 - SDR50
011 - SDR104
101 - Reserved for DDR50
Others - Reserved
Reserved
Toggle Mode 33MHz Preamble Delay, Read Latency:
'000' - 16 GPMICLK cycles.
'001' - 1 GPMICLK cycles.
'010' - 2 GPMICLK cycles.
'011' - 3 GPMICLK cycles.
'100' - 4 GPMICLK cycles.
'101' - 5 GPMICLK cycles.
'110' - 6 GPMICLK cycles.
'111' - 7 GPMICLK cycles.
'1111'- 15 GPMICLK cycles.
USDHC IO VOLTAGE
SELECTION For
Normal Boot Mode
0 - 3.3V
1 - 1.8V
0x470[7:0]
0x470[7:0]
0x470[7:0]
0x470[7:0]
0x470[7:0]
Speed
00 - Normal
01 - High
10 - Reserved for HS200
11 - Reserved
Reserved Reserved
HOLD TIME:
00 - 500us
01 - 1ms
10 - 3ms
11 - 10ms
BT_TOGGLEMODE
Reserved Reserved
FlexSPI FLASH Dummy Cycle
Reserved Reserved Reserved Reserved
SPINOR
FlexSPI
NAND
MMC/eMMC
SD/eSD
Reserved
Flash Auto Probe
FLASH Auto Probe Type
CS select SPI only:
00 - CS#0 default
01 - CS#1
10 - CS#2
11 - CS#3
i.MX8M Mini ROM Fuse
Picture14.4 Table For Boot Configure
14.4 Giga Ethernet
Use a 0.1uF capacitor as bypass capacitor connect to TCT and RCT of the transformer but do not
connect these pins to any power supply.
The 49.9R and capacitor matching networks are not necessary to the differential network. The
designer should decide using these resistors and capacitors or not according to their design.
For LED_ACT Pin that is J2.45, parallel LED output for 10/100/1000 BASE-T activity, active blinking.
LED active low and is 3.3V tolerated.
For LED_1000 Pin that is J2.47, parallel LED output for 1000 BASE-T link, LED active low and is
3.3V tolerated.
For LED_10_100 Pin that is J2.43, parallel LED output for 10/100 BASE-T link. LED active low and
is 3.3V tolerated.
Picture14.5 LED Status