[ASAHI KASEI]
[AK7740ET]
5-4) Microcontroller interface
(AVDD=DVDD=3.0V~3.6V,Ta=-10~70°C,CL=20pF)
Parameter
Symbol
min
typ
max
Unit
Microcontroller interface signal
tWRF
tWRR
8
8
ns
ns
RQ Fall time
RQ Rise time
SCLK fall time
tSF
8
8
ns
ns
ns
ns
SCLKrise time
tSR
SCLK low level width
tSCLKL
tSCLKH
30
30
SCLK high level width
Microcontroller to AK7740
tREW
tWRE
200
200
ns
ns
Time from RESET "↓" to RQ "↓"
Time from RQ "↑" to RESET "↑"
Note 1)
RQ high level width
tWRQH
tWSC
200
200
ns
ns
ns
Time from RQ "↓" to SCLK"↓"
Time from SCLK"↑" to RQ "↑"
tSCW
6×tMCLK
SI latch setup time
tSIS
tSIH
100
100
ns
ns
SI latch hold time
AK7740 to microcontroller
Time from SCLK"↑" to DRDY"↓"
Time from SI"↑"to DRDY"↓"
SI high level width
tSDR
tSIDR
tSIH
3×tMCLK
3×tMCLK
ns
ns
ns
ns
3×tMCLK
tSOS
100
Delay time from SCLK"↓" to SO output
AK7740 to microcontroller
(RAM DATA read-out)
SI latch setup time (SI="H")
SI latch setup time (SI="L")
SI latch hold time
tRSISH
tRSISL
tRSIH
tSOD
30
30
30
ns
ns
ns
ns
100
Time from SCLK"↓" to SO
Note 1) Except for external jump code set at reset state.
<Pre-E-01>
- 13 -
2006/10
AKM [ ASAHI KASEI MICROSYSTEMS ]
