AK7714 Datasheet, PDF (14/48 Pages) Asahi Kasei Microsystems – 20-Bit Audio Codec with DSP and Delay RAM

[ASAHI KASEI]
(5) Switching characteristics
1) System clock
(AVDD = AVB, DVB, DVDD = 5.0 V±5%, Ta = 25°C, CL = 20 pF)
Parameter
Symbol
Min
Master clock (XTI)
a) With a crystal oscillator:
256 fs: Frequency
fMCLK
11.0
384 fs: Frequency
fMCLK
12.288
512 fs: Frequency
fMCLK
16.384
b)With an external clock input:
Duty factor (≤ 18.432 MHz)
40
( > 18.432MHz )
45
256 fs: Frequency
fMCLK
11.0
: High level width
tMCLKH
30
: Low level width
tMCLKL
30
384 fs: Frequency
fMCLK
12.288
: High level width
tMCLKH
20
: Low level width
tMCLKL
20
512 fs: Frequency
fMCLK
16.384
: High level width
tMCLKH
17
: Low level width
tMCLKL
17
Clock rise time
tCR
Clock fall time
tCF
LRCLK Sampling frequency
fs
32
Slave mode: Clock rise time
tLR
Slave mode: Clock fall time
tLF
BITCLK
fBCLK
48
Slave mode: High level width
Slave mode: Low level width
tBCLKH
100
tBCLKL
100
Slave mode: Clock rise time
tBR
Slave mode: Clock fall time
tBF
2) Reset
(AVDD = AVB, DVB, DVDD = 5.0 V ±5%, Ta = 25°C, CL = 20 pF)
Parameter
Symbol
Min
INIT RESET
(Note 1) tRST
150
DSP RESET
(Note 1) tRST
150
CODEC RESET
(Note 1) tRST
150
Note 1. "L" is acceptable when power is turned on.
[AK7714]
Typ
11.2896
16.9344
22.5792
50
50
11.2896
16.9344
22.5792
44.1
1
64
Max
Unit
12.288
18.432
22.5792
60
55
12.288
MHz
MHz
MHz
%
MHz
18.432
MHz
22.5792
MHz
6
ns
6
ns
48
kHz
fs
10
ns
10
ns
fs
6
ns
6
ns
Typ
Max
Unit
ns
ns
ns
M0018-E-00
- 14 -
‘98/07