ak4650 AKM Semiconductor, Inc., ak4650 Datasheet - Page 53

• Manufacturer Part Number: ak4650
• Description: 16bit 6 Codec With Mic/hp/spk-amp & Tsc
• Manufacturer: AKM Semiconductor, Inc.

L
1. Selection of data reception method
The AK4650 supports the following two method for 12bit ADC data reception which is selected by SLOT bit.
2. Measurement Mode Setting
A2-0 and SER bits set the measurement mode (Table 45). PM12AD and PMVREF bits control the 12bit ADC
power-up/down.
DLY3-0 bits set the wait time from mode setting to measurement (Table 47). ADFLT bit sets the averaging of four data or
not (Table 48). If these modes are changed during wait time, 12bit ADC is reset and starts with latest mode setting.
MS0502-E-01
A2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
12bit ADC Data Reception Method
SLOT bit
A2-0, SER bit
0
1
A1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
A0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
“Register”
The AK4650 reports the measurement result (12bit ADC data) to the control register, then
controller gets the data by reading the register of 74H, 76H and 78H.
“Slot”
The AK4650 reports the measurement result (12bit ADC data) to slot 5, slot 6 or slot 12,
then controller gets the data from the asigned slot.
SER
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
XP
Driver switch status
OFF
OFF
OFF
OFF
OFF
OFF
XN
ON
ON
ON
ON
ON
ON
Table 44. 12bit ADC data reception method
Table 45. 12bit ADC measurement mode
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
YP
12bit ADC data reception method
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
YN
ON
ON
- 53 -
YN(Z2)
YN(Z2)
XP(Z1)
XP(Z1)
VBAT
AIN+
IN1
IN2
XP
YP
XP
YP
ADC Input
( AIN)
AIN
GND
GND
GND
GND
GND
GND
GND
YN
XN
XN
XN
VREF+
Reference voltage
VREF
VREF
VREF
VREF
VREF
VREF
VREF
YP
YP
YP
XP
( VREF)
VREF
GND
GND
GND
GND
GND
GND
GND
YN
XN
XN
XN
Measurement item
N/A
N/A
N/A
N/A
N/A (default)
Y-axis
Battery voltage
Pen pressure (Z
Pen pressure (Z
X-axis
IN1 input
Y-axis
Pen pressure (Z
Pen pressure (Z
X-axis
IN2 input
[AK4650]
(default)
1
2
1
2
2007/04
)
)
)
)