參數(shù)資料
型號(hào)： AK4650
廠(chǎng)商： Asahi Kasei Microsystems Co.,Ltd
元件分類(lèi)： Codec
英文描述： 16Bit ツヒ CODEC with MIC/HP/SPK-AMP & TSC
中文描述： 16位ツヒ編解碼器麥克風(fēng)/惠普/胰腎聯(lián)合移植腺苷
文件頁(yè)數(shù)： 56/86頁(yè)
文件大?。?/td> 824K
代理商： AK4650
[AK4650]
MS0502-E-01
2007/04
- 56 -
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
12bit ADC is powered-up by setting PM12AD bit = “1”.
(2)
After the wait time set by DLY3-0 bits, the measurement is executed for four times and the averaged result is reported
to 74H.
(3)
When 74H is read, the data of 74H is output.
S YN C
A 2-0, S E R ,bit
R ead C om m and
S end A D C D ata
A D C M od e
A D E bit
12b it A D C
1010
X M easure
D E LA Y
D 11-D 0 bits
X X X
X -P os
0010
D E L A Y
P M 1 2A D ,
P IN T E bits
Y M easure
Y-P os
74h
X -M easure
W ait
74h
Y -M easure
W ait
11
DLY3-0 bits = “1H” (2TS)
Figure 42. X and Y position measurement sequence (ADFLT bit = “1”)
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
12bit ADC is powered-up by setting PM12AD bit = “1”.
(2)
After the wait time set by DLY3-0 bits, the AK4650 measures X-position and reports the result to 74H. When
ADFLT bit is “1”, averaged data of four measurement results is reported to 74H.
(3)
After X-position measurement and the wait time set by DLY3-0 bits, the AK4650 measures Y-position and reports
the result to 76H. When ADFLT bit is “1”, averaged data of four measurement results is reported to 76H.
(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.
S YN C
A D C M od e
74H :A D E bit
12b it A D C
X M easure
D E LA Y
74H :D 11-D 0
bits
X M easure
X X X
X -P ositio n
Y M easure
A D M O D E 1-0
bits
D E LA Y
y M easure
76H :A D E bit
76H :D 11-D 0
bits
X X X
Y-P osition
01
P M 1 2A D ,
P IN T E bits
10
P E N -W ait
00
DLY3-0 bits = “2H” (4TS)
Figure 43. X and Y position measurement sequence
When ADMODE1-0 bit is set to “01” again, then the AK4650 set ADE bit as “0” and measurement is executed again.
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