ak4650 AKM Semiconductor, Inc., ak4650 Datasheet - Page 57

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

3-3. XYZ Measurement Mode
When ADMODE1-0 bits are set to “10” and PM12AD bit is “1”, the AK4650 measures X-position at first, Y-position at
second, the item set by A2-0 and SER bits at third, and reports X-position to 74H, Y-position to 76H, third result to 78H,
respectively. 74H, 76H and 78H registers are cleared by PM12AD bit = “0”.
(1) 70H(ADFLT, DLY3-0, MSR1-0, ADEXE1-0) is set. Measurement mode should be set by A2-0 and SER bits, and
(2) After the wait time set by DLY3-0 bits, the AK4650 measures X-position and reports the result to 74H. When
(3) After X-position measurement and the wait time set by DLY3-0 bits, the AK4650 measures Y-position and reports
(4) After Y-position measurement and the wait time set by DLY3-0 bits, the AK4650 measures the item set by A2-0 and
(5) After the measurement, ADMODE1-0 bits are automatically reset to “00”.
(6) When PINTE bit = “1”, 12bit ADC is powered-down and the AK4650 waits for pen touch.
When ADMODE1-0 bit is set to “10” again, then the AK4650 set ADE bit as “0” and measurement is executed again.
MS0502-E-01
S Y N C
P M 1 2 A D ,
P IN T E b it s
A D M O D E 1 - 0
A D C M o d e
1 2 b it A D C
7 4 H : A D E b it
7 4 H :D 1 1 - D 0 b its
7 6 H : A D E b it
7 6 H :D 1 1 - D 0 b its
7 8 H : A D E b it
7 8 H :D 1 1 - D 0 b its
ADMODE1-0 bits should be set to “10” at the same time. 12bit ADC is powered-up by setting PM12AD bit = “1”.
ADFLT bit is “1”, averaged data of four measurement results is reported to 74H.
the result to 76H. When ADFLT bit is “1”, averaged data of four measurement results is reported to 76H.
SER bits, and reports the result to 78H. When ADFLT bit is “1”, averaged data of four measurement results is
reported to 78H.
Figure 44. X, Y and Z position measurement sequence (ADFLT bit = “1”, A2-0 bits = “011”, SER bit = “0”)
b its
1 0
X M e a s u r e
D E L A Y
1 1
X X X
X X X
X X X
X M e a s u r e
D E L A Y
Y M e a s u r e
X - P o s itio n
DLY3-0 bits = “1H” (2TS)
y M e a s u r e
- 57 -
D E L A Y
Z 1 M e a s u r e
Y - P o s it io n
Z 1 M e a s u r e
Z 1 - P o s it io n
0 0
P E N - W a it
[AK4650]
2007/04