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| 型號： | EVAL-AD7879EBZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 40/41頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD EVALUATION FOR AD7879 |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 主要目的： | 接口，觸摸屏控制器 |
| 嵌入式： | 否 |
| 已用 IC / 零件： | AD7879 |
| 主要屬性： | 4 線電阻式觸控屏控制器，I²C 和 SPI 接口 |
| 次要屬性： | 圖形用戶界面，USB 接口 |
| 已供物品： | 板，線纜，CD，觸控屏 |
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AD7879/AD7889
Rev. C | Page 7 of 40
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
07667-
005
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
AUX/
VBAT/
GPIO
VCC/REF
X+
Y+
DOUT
DIN
X–
SCL
GND
Y–
1
A
B
C
D
2
3
BALL A1
INDICATOR
PENIRQ/
INT/DAV
CS
Figure 5. AD7879/AD7889 WLCSP Pin Configuration
07667-
006
TOP VIEW
(BALL SIDE DOWN)
Not to Scale
AUX/
VBAT/
GPIO
VCC/REF
X+
Y+
SDA
ADD1
X–
SCL
GND
Y–
1
A
B
C
D
2
3
BALL A1
INDICATOR
PENIRQ/
INT/DAV ADD0
Figure 6. AD7879-1/AD7889-1 WLCSP Pin Configuration
Table 6. Pin Function Descriptions, WLCSP
Ball No.
Mnemonic
Description
AD7879/
AD7889
AD7879-1/
AD7889-1
1A
AUX/VBAT/GPIO
This pin can be programmed as an auxiliary input to the ADC (AUX), as a battery measure-
ment input to the ADC (VBAT), or as a general-purpose digital input/output (GPIO).
1B
PENIRQ/INT/DAV
Interrupt Output. This pin is asserted when the screen is touched (PENIRQ), when a measure-
ment exceeds the preprogrammed limits (INT), or when new data is available in the registers
(DAV). Active low, internal 50 k pull-up resistor.
1C
N/A
DOUT
SPI Serial Data Output for the AD7879/AD7889.
N/A
1C
SDA
I2C Serial Data Input and Output for the AD7879-1/AD7889-1.
1D
SCL
Serial Interface Clock Input.
2A
VCC/REF
Power Supply Input and ADC Reference.
2B
N/A
CS
Chip Select for the SPI Serial Interface on the AD7879/AD7889. Active low.
N/A
2B
ADD0
I2C Address Bit 0 for the AD7879-1/AD7889-1. This pin can be tied high or low to determine
an address for the AD7879-1/AD7889-1 (see Table 25).
2C
N/A
DIN
SPI Serial Data Input to the AD7879/AD7889.
N/A
2C
ADD1
I2C Address Bit 1 for the AD7879-1/AD7889-1. This pin can be tied high or low to determine
an address for the AD7879-1/AD7889-1 (see Table 25).
2D
GND
Ground. Ground reference point for all circuitry on the AD7879/AD7889. All analog input
signals and any external reference signal should be referred to this voltage.
3A
X+
Touch Screen Input Channel.
3B
Y+
Touch Screen Input Channel.
3C
X
Touch Screen Input Channel.
3D
Y
Touch Screen Input Channel.
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