CS8427 Cirrus Logic, CS8427 Datasheet - Page 7

• Manufacturer Part Number: CS8427
• Description: 96 kHz Digital Audio Interface Transceiver
• Manufacturer: Cirrus Logic

SWITCHING CHARACTERISTICS - SERIAL AUDIO PORTS
(T
Logic 0 = 0V, Logic 1 = VL+; C
Notes: 6. The active edges of ISCLK and OSCLK are programmable.
DS477PP3
OSCLK Active Edge to SDOUT Output Valid
SDIN Setup Time Before ISCLK Active Edge
SDIN Hold Time After ISCLK Active Edge
Master Mode
O/RMCK to I/OSCLK active edge delay
O/RMCK to I/OLRCK delay
I/OSCLK and I/OLRCK Duty Cycle
Slave Mode
I/OSCLK Period
I/OSCLK Input Low Width
I/OSCLK Input High Width
I/OSCLK Active Edge to I/OLRCK Edge
I/OLRCK Edge Setup Before I/OSCLK Active Edge
A
(o u tp u t)
IS C L K
O S C L K
(o u tp u t)
R M C K
O M C K
(in p u t)
IL R C K
O L R C K
= 25 °C for suffixes ‘CS’ &’CZ’, T
Figure 1. Audio Port Master Mode Timing
10. This setup time ensures that this I/OSCLK edge is interpreted as the first one after I/OLRCK has
7. The polarity of ILRCK and OLRCK is programmable.
8. No more than 128 SCLK per frame.
9. This delay is to prevent the previous I/OSCLK edge from being interpreted as the first one after I/OLRCK
has changed.
changed.
t s m d
Parameter
L
= 20 pF)
t
lm d
(Note 6)(Note 7)(Note 10)
A
(Note 6)(Note 7)(Note 9)
= -40 to 85 °C for ‘IS’ & ‘IZ’ ; VA+ = 5 V±10%, VL+ = 3/5 V ±5/10% , Inputs:
(Note 6)
(Note 6)
(Note 6)
(Note 6)
(Note 7)
(Note 8)
ISCLK
OSCLK
ILRCK
OLRCK
SDOUT
(input)
(input)
SDIN
Figure 2. Audio Port Slave Mode and Data Input Timing
Symbol
t
t
t
t
t
t
t
t
t
sckw
sckh
lrckd
lrcks
smd
t
t
sckl
dpd
lmd
lrckd
ds
dh
t
lrcks
Min
20
20
36
14
14
20
20
0
0
-
-
t
ds
Typ
t
50
sckh
t
-
-
-
-
-
-
-
-
-
-
dh
t
sckw
Max
20
10
10
t
-
-
-
-
-
-
-
-
sckl
t dpd
CS8427
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
%
7