AK7746 Datasheet, PDF (15/62 Pages) Asahi Kasei Microsystems – Audio DSP with 5-channel 24-bit ADC and Input Mux

[ASAHI KASEI]
5-4) Microcomputer Interface
(AVDD=DVDD=3.0V~3.6V, Ta=-40~85°C, CL=20pF)
Parameter
Symbol
min
typ
Microcomputer Interface Signal
RQ Fall time
tWRF
RQ Rise time
SCLK fall time
SCLKrise time
SCLK frequency
SCLK low level width
SCLK high level width
Microcomputer to AK7746
Time from RESET "↓" to RQ "↓"
Time from RQ "↑" to RESET "↑"
Note 1)
tWRR
tSF
tSR
1/fSCLK
tSCLKL
350
tSCLKH
350
tREW
500
tWRE
500
RQ high level width
tWRQH
500
Time from RQ "↓" to SCLK"↓"
tWSC
500
Time from SCLK"↑" to RQ "↑”
tSCW
800
SI latch setup time
SI latch hold time
tSIS
300
tSIH
300
AK7746 to microcomputer
Time from SCLK"↑" to DRDY"↓"
tSDR
Time from SI"↑"to DRDY"↓"
tSIDR
SI high level width
tSIH
600
Delay time from SCLK"↓" to SO output
tSOS
Hold time from SCLK"↑" to SO output
tSOH
150
AK7746 to microcomputer (RAM DATA read-out)
SI latch setup time (SI="H")
SI latch setup time (SI="L")
tRSISH
300
tRSISL
300
SI latch hold time
Time from SCLK"↓" to SO output
tRSIH
300
tSOD
AK7746 to microcomputer (CRC result out) (Note 2)
Delay time from RQ "↑" to SO output
tRSOC
Delay time from RQ "↓" to SO output
(Note 3) tFSOC
300
CS
CS Fall time
tCSF
CS Rise time
tCSR
Time from S_RESET "↓" to CS "↓"
Time from CS "↑" to S_RESET "↑"
tWRCS
600
tWCSR
600
CS high level width
tWCSH
1000
Time from CS "↓" to RQ "↓"
tWCSRQ
600
Time from RQ "↑" to CS "↑"
tWRQCS
600
CS "↓" to SO,RDY,DRDY Hi-Z release
tCSHR
CS "↑" to SO,RDY,DRDY Hi-Z
tCSHS
Note 1) Except for external jump code set at reset state.
Note 2) If there is excess serial data D(x) and when divided by G(x) it is equal to R(x), then SO = “H”.
Note 3) Must read for more than 300ns before RQ falls .
[AK7746]
max
Unit
30
ns
30
ns
30
ns
30
ns
1.4
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
600
ns
600
ns
ns
300
ns
ns
ns
ns
ns
300
ns
400
ns
ns
30
ns
30
ns
ns
ns
ns
ns
ns
600
ns
600
ns
[MS0369-E00]
- 15 -
2004/12