AK8963C Datasheet, PDF (6/38 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK8963]
4.3. Pin Function
QFN WLCSP
Pin
Pin
No. No.
Pin
name
I/O
Power
supply
system
1
A1 DRDY O VID
2
A2
CSB I VID
SCL
3
A3
I VID
SK
SDA I/O
5
A4
VID
SI
I
15
B1
VDD -
-
4
B3
RSV O VID
6
B4
SO O VID
13
C1
VSS -
-
14
C2 TST1 I VDD
7
C3
TRG I VID
8
C4
VID -
-
12
D1 CAD0 I VDD
11
D2 CAD1 I VDD
10
D4 RSTN I VID
Type
CMOS
CMOS
CMOS
CMOS
Power
CMOS
CMOS
Power
CMOS
CMOS
Power
CMOS
CMOS
CMOS
Function
Data Ready output pin.
“H” active. Informs measurement ended and data is ready to be read.
Chip select pin for 4-wire SPI.
“L” active. Connect to VID when selecting I²C bus interface.
When the I²C bus interface is selected (CSB pin is connected to VID)
SCL: Control data clock input pin
Input: Schmidt trigger
When the 4-wire SPI is selected
SK: Serial clock input pin
When the I²C bus interface is selected (CSB pin is connected to VID)
SDA: Control data input/output pin
Input: Schmidt trigger, Output: Open drain
When the 4-wire SPI is selected
SI: Serial data input pin
Analog Power supply pin.
Reserved.
Keep this pin electrically non-connected.
When the I²C bus interface is selected (CSB pin is connected to VID)
Hi-Z output. Keep this pin electrically non-connected.
When the 4-wire SPI is selected
Serial data output pin
Ground pin.
Test pin.
Pulled down by 100kΩ internal resister. Keep this pin electrically
non-connected or connect to VSS.
External trigger pulse input pin.
Enabled only in External trigger mode. Pulled down by 100kΩ internal
resister. When External trigger mode is not in use, keep this pin
electrically non-connected or connect to VSS.
Digital interface positive power supply pin.
When the I²C bus interface is selected (CSB pin is connected to VID)
CAD0: Slave address 0 input pin
Connect to VSS or VDD.
When the 4-wire serial interface is selected
Connect to VSS.
When the I²C bus interface is selected (CSB pin is connected to VID)
CAD1: Slave address 1 input pin
Connect to VSS or VDD.
When the 4-wire serial interface is selected
Connect to VSS.
Reset pin.
Resets registers by setting to “L”. Connect to VID when not in use.
MS1356-E-02
-6-
2013/10