SPI_CS#
7Dh
41h
7Fh
7Fh
66h
7Fh
AAh
7Fh
AAh
7Fh
55h
7Fh
80h
7Ah
7Ah
7Dh
41h
7Eh
66h
45h
7Dh
43h
40h
78h
7Fh
7Fh
56h
SPI_MOSI
SPI_MISO
AAh
(invalid)
AAh
(invalid)
55h
(invalid)
XXh
(invalid)
XXh
(invalid)
XXh
(invalid)
YYh
(invalid)
YYh
(invalid)
XXh
(invalid)
45h
43h
46h
78h
42h
AAh
41h 41h
55h 66h
42h
AAh
44h
80h
43h
55h
40h
80h
40h
56h
00h
XXh
41h
45h
SPI Address Pointer
SPI Data output buffer
Register Address /
Data
40h / 56h
41h / 45h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 45h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
40h / 56h
41h / 66h
42h / AAh
43h / 55h
44h / 80h
45h / 43h
46h / 78h
46h / 78h
46h / 78h
46h / 78h
46h / 78h
46h / 78h
46h /78h
46h /78h
46h / 78h
46h /78h
Indicates SPI Address pointer incremented
Figure 3.1 Example SPI Bus Communication - Normal Mode
3.5.1
Reset Interface
Resets the Serial interface whenever two successive 7Ah codes are received. Regardless of the current phase of the transaction - command or data,
the receipt of the successive reset commands resets the Serial communication interface only. All other functions are not affected by the reset operation.
SMSC [ SMSC CORPORATION ]
