AK8999AW Datasheet, PDF (59/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC

CONFIDENTIAL
[AK8999A/AW/AD]
j) Measurement mode setup (EEPROM name: MM1, MM2)
This EEPROM is used for setting up the measurement mode for the AK8999A.
A setup of a sampling frequency, supply voltage & sensor drive voltage, the enable / disable of
Internal SCF & SMF, the internal / external of a temperature sensor, the internal switching of VP &
VN, and the initial state of VOUT pin at power-up can be performed.
Address : 0D hex D[7:0] = ESCF[1:0], EVD[1:0], ESF[0] , EVPN[0], ETMP[1:0]
D[7:0] Symbol
Mode setup
D[7]
0
1
EVPN[0]
VPNN
VPNR
VP & VN internal switching EEPROM
VP->VP, VN->VN (default)
VP->VN, VN->VP
D[6:5] ETMP[1:0] Temperature sensor Internal & External change EEPROM
00 TMPESi External temperature sensor use & Drive sink current (default)
01 TMPESo External temperature sensor use & Drive source current
10 TMPI Internal temperature sensor use
11 Reserved Setup prohibited
D[4:3] ESCF[1:0] Internal SCF & SMF setup EEPROM
00 SCDS Internal SCF & SMF disable (default)
01 SCEN1 Internal SCF & SMF enable & Cutoff frequency 1kHz
10 SCEN2 Internal SCF & SMF enable & Cutoff frequency 500Hz
11 SCEN3 Internal SCF & SMF enable & Cutoff frequency 250Hz
D[2:1] EVD[1:0] Supply voltage & sensor drive voltage setup EEPROM
00 VDD302 Supply voltage at 3V & sensor drive voltage at 2.2V (default)
01 VDD332 Supply voltage at 3.3V & sensor drive voltage at 2.2V
10 VDD502 Supply voltage at 5V & sensor drive voltage at 2.2V
11 VDD504 Supply voltage at 5V & sensor drive voltage at 4V
D[0]
ESF[0] Sampling frequency setup EEPROM
0 SF11 Sampling frequency 8.33kHz (default)
1
SF1
Sampling frequency 0.83kHz
Address : 0E hex D[1:0] = EVOUT[1:0]
D[1:0]
Symbol
Mode setup
D[1:0] EVOUT[1:0] Initial state of VOUT pin at power-up setup EEPROM
00 STVSS VSS set at power-up (default)
01 STVDD VDD set at power-up
10 ST1/2VDD 0.5*VDD set at power-up
11 Reserved Setup prohibited
MS1600-E-00
- 59 -
2014/05