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Page 15 of 80
DNT90 Integration Guide - 08/09/12
shows the required SPI master mode-signal connections, and Figure 3.2.2 shows the SPI master-mode
timing.
D N T 9 0 S P I M a s t e r M o d e O p e r a t i o n
/ S S
S C L K
M O S I
M I S O
Figure 3.2.2
In SPI slave mode, the host can stream data into DNT90E at up to 250 kbps, provided the host suspends
clocking within 10 bytes following a low-to-high transition on /HOST_CTS. The host can clock data into
the DNT90E at up to 4 Mbps for data bursts of up to 50 bytes, provided the interval from the end of one
burst to the start of the next burst is at least 2 ms, and the host suspends clocking on a low-to-high transi-
tion on /HOST_CTS. See Figure 3.2.4
D N T 9 0 S P I S l a v e M o d e S i g n a l i n
g
H o s t
M I
S
O
D N T
9 0
M O S I
S C
L
K
/ S S
/ H O
S
T R
T
S
/ H O
S
T C
T
S
D A V
Figure 3.2.3