EarthLCD ezLCD-405, Manual, Page: 130 / 173

e z L C D -­‐ 4 0 5 | 130
Rev.
© 2016 Earth Computers Tech. Inc.
1.7.49 SD_RAW_READ
Description: Reads the data from SD starting from the specified SD address. SD is treated as a
memory with the starting address 0.
Code: 7E hex, 126 dec
7 6 5 4 3 2 1 0
Byte 0: Command
1 0 1 0 0 1 0 1 Byte 1: Password ( A5
hex
, 165
dec
)
Byte 2: Address 0 (LSB)
Byte 3: Address 1
Byte 4: Address 2
Byte 5: Address 3 (MSB)
Byte 6: Number of Bytes to Read 0 (LSB)
Byte 7: Number of Bytes to Read 1
Byte 8: Number of Bytes to Read 2
Byte 9: Number of Bytes to Read 3 (MSB)
See Also: SD_RAW_WRITE
ezLCD Response
After receiving the SD_RAW_READ command, the ezLCD responds with either of the following
sequences:
SD_RAW_READ
Address 0
Address 3
32
-­‐bi
t A
ddr
es
s
Address 1
Number of Bytes to Read 1
Address 2
Number of Bytes to Read 0
Number of Bytes to Read 2
Number of Bytes to Read 3 32
-­‐bi
t no
. o
f by
te
s
to
re
ad