Cirrus Logic CS5451A - Manual (Page 6)

CS5451A
6 DS635F4
SWITCHING CHARACTERISTICS
• Min/Max characteristics and specifications are guaranteed over all Operating Conditions.
• Typical characteristics and specifications are measured at nominal supply voltages and TA = 25 °C.
• VA+ = VD+ = 3 V ±10%; VA- = -2 V ±10%; AGND = DGND = 0 V. All voltages with respect to 0 V.
• Logic Levels: Logic 0 = 0 V, Logic 1 = VD+
Notes: 6. Specified using 10% and 90% points on wave-form of interest. Output loaded with 50 pF.
7. Device parameters are specified with XIN = 4.096 MHz.
8. Device parameters are specified with OWRS = 1.
9. After SE is asserted, the states of SDO and SCLK are FSO is undefined.
Parameter Symbol Min Typ Max Unit
Rise Times Any Digital Input (except XIN)
(Note 6) XIN only
Any Digital Output
t
rise
-
-
- -
-
50
1.0
10
-
µs
ns
ns
Fall Times Any Digital Input (except XIN)
(Note 6) XIN only
Any Digital Output
t
fall
-
-
- -
-
50
1.0
10
-
µs
ns
ns
Serial Port Timing
Serial Clock Frequency OWRS = “0”
(Note 7) OWRS = “1”
SCLK
SCLK -
- 500
1000
-
- kHz
kHz
Serial Clock Pulse Width High
(Note 7 and 8) Pulse Width Low
t
1
t
2
-
- 0.5
0.5 -
- SCLK
SCLK
SCLK falling to New Data Bit t
3
- - 50 ns
FSO Falling to SCLK Rising Delay (Note 7 & 8) t
4
- 0.5 - SCLK
FSO Pulse Width (Note 7 & 8) t
5
- 1 - SCLK
SE Rising to Output Enabled (Note 9) t
6
- - 50 ns
SE Falling to Output in Tri-state t
7
- - 50 ns
t
7
t
2
t
1
t
3
4
t
5
t
MSB(V1) MSB(V1) - 1 LSB(I3)
SE
6
t
SDO
SCLK
FSO
Figure 1. Serial Port Timing