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AK4958ECB Datasheet, PDF (23/35 Pages) Asahi Kasei Microsystems – 24bit Stereo CODEC with MIC/SPK/VIDEO-AMP & LDO | |||
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[AK4958]
Parameter
Symbol min
typ
max Unit
Audio Interface Timing
Master Mode
BICK âï¯â to LRCK Edge (Note 34)
LRCK Edge to SDTO (MSB)
(Except I2S mode)
tMBLR
ï40
-
tLRD
ï70
-
40
ns
70
ns
BICK âï¯â to SDTO
SDTI Hold Time
SDTI Setup Time
tBSD
ï70
-
tSDH
50
-
tSDS
50
-
70
ns
-
ns
-
ns
Slave Mode
LRCK Edge to BICK âïâ (Note 34)
BICK âïâ to LRCK Edge (Note 34)
LRCK Edge to SDTO (MSB)
(Except I2S mode)
BICK âï¯â to SDTO
SDTI Hold Time
SDTI Setup Time
tLRB
50
-
-
ns
tBLR
50
-
-
ns
tLRD
-
-
80
ns
tBSD
-
-
80
ns
tSDH
50
-
-
ns
tSDS
50
-
-
ns
Control Interface Timing (3-wire Mode) (Note 35)
CCLK Period
tCCK
200
-
-
ns
CCLK Pulse Width Low
tCCKL
80
-
-
ns
Pulse Width High
tCCKH
80
-
-
ns
CDTIO Setup Time
tCDS
40
-
-
ns
CDTIO Hold Time
tCDH
40
-
-
ns
CSN âHâ Time
tCSW
150
-
-
ns
CSN Edge to CCLK âïâ (Note 36)
tCSS
50
-
-
ns
CCLK âïâ to CSN Edge (Note 36)
tCSH
50
-
-
ns
CCLK âï¯â to CDTIO (at Read Command)
tDCD
-
-
70
ns
CSN âïâ to CDTIO (Hi-Z) (at Read Command)(Note 38)
tCCZ
-
Control Interface Timing (I2C Bus Mode):
-
70
ns
SCL Clock Frequency
fSCL
-
-
400 kHz
Bus Free Time Between Transmissions
tBUF
1.3
-
-
ïs
Start Condition Hold Time (prior to first clock pulse)
tHD:STA 0.6
-
-
ïs
Clock Low Time
tLOW
1.3
-
-
ïs
Clock High Time
tHIGH
0.6
-
-
ïs
Setup Time for Repeated Start Condition
tSU:STA 0.6
-
-
ïs
SDA Hold Time from SCL Falling (Note 39)
tHD:DAT
0
-
-
ïs
SDA Setup Time from SCL Rising
tSU:DAT 0.1
-
-
ïs
Rise Time of Both SDA and SCL Lines
tR
-
-
0.3
ïs
Fall Time of Both SDA and SCL Lines
tF
-
-
0.3
ïs
Setup Time for Stop Condition
tSU:STO 0.6
-
-
ïs
Capacitive Load on Bus
Cb
-
-
400
pF
Pulse Width of Spike Noise Suppressed by Input Filter
tSP
0
-
50
ns
Note 34. ãã®è¦æ ¼å¤ã¯LRCKã®ã¨ãã¸ã¨BICKã® âïâãéãªããªãããã«è¦å®ãã¦ãã¾ãã
Note 35. 3-wire Modeã¯AK4958ECBã§ã¯å¯¾å¿ãã¦ããã¾ããã
Note 36. ãã®è¦æ ¼ã¯CSNã®ã¨ãã¸ã¨CCLKã® âïâãéãªããªãããã«è¦å®ãã¦ãã¾ãã
Note 37. I2C-busã¯NXP B.V.ã®åæ¨ã§ãã
Note 38. Hi-zã¨ã¯RL =1kï (ãã«ã¢ãã㯠TVDDã«å¯¾ãã¦)æã10% CDTIO pin ã®é»ä½ãå¤åããã¾ã§ã®æéã§
ãã
Note 39. ãã¼ã¿ã¯æä½300ns (SCLã®ç«ã¡ä¸ããæé)ã®éä¿æãããªããã°ãªãã¾ããã
MS1558-J-01-PB
- 23 -
2013/10
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