AS3932-BTST austriamicrosystems, AS3932-BTST Datasheet - Page 18

• Manufacturer Part Number: AS3932-BTST
• Description: IC RF PROGRAM 16-TSSOP
• Manufacturer: austriamicrosystems

Specifications of AS3932-BTST

• Rf Type: Read / Write
• Frequency: 110kHz ~ 150kHz
• Features: RSSI Equipped
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AS3932-BTSTTR

AS3932
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 14. Writing of Register Data with Auto-incrementing Address
Reading of Data from Addressable Registers (READ Mode).
through the SDO pin out to the microcontroller.
A CS LOW toggling high-low-high has to be performed after finishing the read mode session, in order to indicate the end of the READ command
and prepare the Interface to the next command control Byte.
To transfer bytes from consecutive addresses, SDI master has to keep the CS signal high and the SCLK clock has to be active as long as data
need to be read.
Figure 15. Reading of Single Register Byte
www.austriamicrosystems.com/LF-Receiver/AS3932
CS
SCLK
SDI
CS
SCLK
SDI
SDO
X
X
0 0
WRITE Mode
Two leading
Zeros indicate
01 pattern
READ Mode
indicates
0
A
5
A
4
1
A
3
A
2
A5
A
1
A
0
X
D
7
µC
A4
SCLK raising
edge Dat a is
transfered from
D
6
D
5
Data is moved
D
4
A3
to Address
<A5-A0>
D
3
D
2
A2
D
1
sampled
SCLK
Data is
falling edge
D
0
D
7
A1
D
6
D
5
Dat a is mov ed
<A5-A0> + 1
A0
D
4
to Addres s
Revision 1.4
D
3
Once the address has been sent through SDI, the data can be fed
<A5-A0>
D
2
Address
D7
SCLK rais ing
edge Data is
mov ed f rom
1
D
D
0
D
7
D6
D
6
<A5-A0 > + (n- 1)
Data is moved
D5
to Addres s
µC
SCLK falling
edge Data is
transfered to
D4
D
1
D
0
D3
7
D
D
6
X
D
5
D2
Data is moved
<A5-A0 > + n
D
4
to Address
3
D
D
2
D1
D
1
D
0
D0
X
Mode
CS falling
end of
edge signals
end of READ
CS falling
edge signals
WRITE Mode
X
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