Datasheet

A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D00
t
SSSU
t
SU
t
H
t
PH
t
PL
t
SSH
t
SSOF
SS
(host)
SCK
(host)
MOSI
(host)
MISO
(device)
Hi-Z
'21¶7&$5(
t
OZD
t
ODZ
Hi-Z
20%
80%
V
OD
-
V
OD
+
V
OS
V
SSP-P
= (V
OD
+) ± (V
OD
-)
0V differential
t
r
+ V
OD
20%
80%
t
f
V
SSP-P
- V
OD
LMH0395
www.ti.com SNLS323L –AUGUST 2010–REVISED APRIL 2013
SPI Interface AC Electrical Characteristics
Over Supply Voltage and Operating Temperature ranges, unless otherwise specified
(1)
.
Parameter Test Conditions Reference Min Typ Max Units
Recommended Input Timing Requirements
f
SCK
SCK Frequency 20 MHz
t
PH
% SCK
SCK Pulse Width High 40
SCK period
Figure 4, Figure 5
t
PL
% SCK
SCK Pulse Width Low 40
period
t
SU
MOSI Setup Time 4 ns
Figure 4, Figure 5 MOSI
t
H
MOSI Hold Time 4 ns
t
SSSU
SS Setup Time 14 ns
t
SSH
SS Hold Time 4 ns
Figure 4, Figure 5 SS
t
SSOF
SCK
SS Off Time 1
period
Switching Characteristics
t
ODZ
MISO Driven-to-Tristate Time 20 ns
t
OZD
MISO Tristate-to-Driven Time Figure 5 MISO 10 ns
t
OD
MISO Output Delay Time 15 ns
(1) Typical values are stated for V
CC
= +2.5V and T
A
= +25°C.
Timing Diagrams
Figure 3. LVDS Output Voltage, Offset, and Timing Parameters
Figure 4. SPI Write
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