AK7750 Datasheet, PDF (20/77 Pages) Asahi Kasei Microsystems – Audio DSP with Built-in Hands-Free Phone Features

[ASAHI KASEI]
[AK7750]
4) Microprocessor Interface
(AVDD=DVDD=3.0 to 3.6V,Ta= Ta=-40°C to 85°C, CL=20pF)
Parameter
symbol
min
typ max Units
µC I/F signal
RQ fall time
RQ rise time
SCLK fall time
SCLK rise time
SCLK low level width
SCLK high level width
tWRF
tWRR
tSF
tSR
tSCLKL
100
tSCLKH
100
8
ns
8
ns
8
ns
8
ns
ns
ns
µC → AK7750
S_RESET "↓" to RQ "↓"
tREW
200
ns
RQ "↑" to S_RESET "↑"
note1) tWRE
200
ns
RQ high level width
tWRQH
200
ns
Time from RQ "↓" to SCLK"↓"
tWSC
200
ns
Time from SCLK"↑" to RQ "↑"
tSCW
12×tMCLK
ns
SI latch setup time
tSIS
100
ns
SI latch hold time
tSIH
100
ns
AK7750 → µC (DBUS output)
SCLK"↑" to DRDY"↓"
Time from SI "↑" to DRDY"↓"
SI high level width
Delay time from SCLK"↓" to SO output
Hold time from SCLK "↑" to SO outout
AK7750 → µC (RAM DATA read-out)
SI latch setup time(SI="H")
SI latch setup time(SI="L")
SI latch hold time
Delay time from SCLK "↓" to SO output
tSDR
tSIDR
tSIH
tSOS
tSOH
tRSISH
tRSISL
tRSIH
tSOD
3×tMCLK
100
30
30
30
3×tMCLK ns
3×tMCLK ns
ns
100
ns
ns
ns
ns
ns
100
ns
AK7750 → µC (CRC result-out)
note2)
Delay time from RQ "↑" to SO output
tRSOC
Delay tiem from RQ "↓" to SO output note3) tFSOD
50
200
ns
ns
CS (EESEL=”L” or open)
CS fall time
tCSF
CS rise time
tCSR
Time from S_RESET "↓" to CS "↓"
tWRCS
400
Time from CS "↑" to S_RESET "↑"
tWCSR
400
CS high level width
tWCSH
800
Time from CS "↓" to RQ "↓"
tWCSRQ
400
Time from RQ "↑" to CS "↑"
tWRQCS
400
CS "↓" to SO,RDY,DRDY Hi-Z release (RL=10kΩ) tCSHR
CS "↑" to SO,RDY,DRDY Hi-Z (RL=10kΩ)
tCSHS
8
ns
8
ns
ns
ns
ns
ns
ns
600
ns
600
ns
EEPROM → AK7750(EESEL=”H”)
EESO latch setup time
tEESOS
100
ns
EESO latch hold time
tEESOH
100
ns
Note1: Excluding an external conditional jump at reset.
Note2: This is a case where the remainder of serial data D( x) ,divided by the Generator Polynomial G (x) is
equal to R (x). SO becomes “H”.
Note3: This means that data must be taken into the microprocessor 50 ns earlier than the falling edge of
RQ (this applies when no read-out is made during RUN).
[MS0296-E-00]
20
2005/03