ak4650 AKM Semiconductor, Inc., ak4650 Datasheet - Page 56

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

3-1-2.ADFLT bit = “1” : Averaging of four data
(1) 70H (ADFLT, DLY3-0 and ADEXE1-0) is set. A2-0 and SER bits set the measurement mode at the same time, and
(2) After the wait time set by DLY3-0 bits, the measurement is executed for four times and the averaged result is reported
(3) When 74H is read, the data of 74H is output.
3-2. X-Y Measurement Mode
When ADMODE1-0 bits are set to “01” and PM12AD bit is “1”, the AK4650 measures X-position at first, Y-position at
second, and reports X-position to 74H, Y-position to 76H, respectively, regardless of A2-0 and SER bits. 74H and 76H
registers are cleared by PM12AD bit = “0”.
(1) 70H(ADFLT, DLY3-0, MSR1-0, ADEXE1-0) is set. ADMODE1-0 bits should be set to “01” at the same time, 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 the measurement, ADMODE1-0 bits are automatically reset to “00”.
(5) When PINTE bit = “1”, 12bit ADC is powered-down and the AK4650 waits for pen touch.
When ADMODE1-0 bit is set to “01” 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 2 - 0 , S E R , b it
R e a d C o m m a n d
S e n d A D C D a t a
A D C M o d e
1 2 b it A D C
A D E b it
D 1 1 - D 0 b its
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
12bit ADC is powered-up by setting PM12AD bit = “1”.
to 74H.
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.
b its
D E L A Y
1 0 1 0
X M e a s u r e
0 1
X M e a s u r e
D E L A Y
1 1
1 0
X X X
X X X
X X X
Figure 42. X and Y position measurement sequence (ADFLT bit = “1”)
X - M e a s u r e
Figure 43. X and Y position measurement sequence
X M e a s u r e
W a it
DLY3-0 bits = “1H” (2TS)
DLY3-0 bits = “2H” (4TS)
X - P o s
7 4 h
Y M e a s u r e
D E L A Y
X - P o s itio n
- 56 -
D E L A Y
Y M e a s u r e
0 0 1 0
y M e a s u r e
Y - M e a s u r e
0 0
P E N - W a it
Y - P o s itio n
W a it
Y - P o s
7 4 h
[AK4650]
2007/04