STV-6101-R01 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV-6101-R01' PDF : 17 Pages View PDF
Application information
VM6101
2.4.2
Alternate slave address selection
After power-on or after resuming from power-down, the 7-bit slave address is 0x10. If
another slave device shares the same address, it is possible to remap the VM6101 to
address 0x11 by performing the following operations:
1. Connect the INT pin to a pull-up resistor to VDD (1 MΩ typ.).
2. After power-on or power-down resume, issue a write command to set the ADDR_SEL
bit of CONTROL register (i.e. write 0x10 at register address 0x02, slave address 0x10).
3. At this time, the VM6101 samples the INT pin and sets its slave address accordingly:
INT sampled low: 7-bit address = 0x10,
INT sampled high: 7-bit address = 0x11.
Two VM6101 can thus coexist on the same bus; one should have its INT pin pulled low, the
other one should have its INT pin pulled high (see Figure 5.).
3
Application information
Figure 5. Application diagram
+3.3V VM6101
VDD
SCL
NC
AMUX SDA
TEST
INT
GND
PD
I²C 7-bit addr = 0x10
+3.3V VM6101
VDD
SCL
NC
AMUX SDA
TEST
INT
GND
PD
I²C 7-bit addr = 0x11
+3.3V
Optional
+3.3V
Host Microcontroller
SCL
SDA
GPIO0
GPIO1
GPIO2
GPIO3
Note: Rb value depends on bus capacitive load
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