ATAM862P-TNSY4D Atmel, ATAM862P-TNSY4D Datasheet - Page 90

• Manufacturer Part Number: ATAM862P-TNSY4D
• Description: IC MCU FLASH 4K TX 433MHZ 24SSOP
• Manufacturer: Atmel

Specifications of ATAM862P-TNSY4D

• Applications: UHF ASK/FSK
• Core Processor: MARC4
• Program Memory Type: FLASH (4 kB)
• Controller Series: MARC4 4-Bit
• Ram Size: 256 x 4
• Interface: SSI
• Number Of I /o: 11
• Voltage - Supply: 1.8 V ~ 4 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Processor Series: ATAM862x
• Core: MARC4
• Data Bus Width: 4 bit
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

24.2.4
90
ATAM862-4
Combination Mode 9: Biphase Demodulation
SSI mode 1:
Timer 3 mode 11:
In the Biphase demodulation mode the timer works like in the Manchester demodulation mode.
The difference is that the bits are decoded with the toggle flip-flop. This flip-flop samples the
edge in the middle of the bitframe and the compare register 1 match event shifts the toggle
flip-flop output into shift register. Before activating the demodulation the timer and the demodula-
tion stage must be synchronized with the bitstream. The Biphase code timing consists of parts
with the half bitlength and the complete bitlength. The synchronization routine must start the
demodulator after an interval with the complete bitlength.
The counter can be driven by any internal clock source and the output T3O can be used by
Timer 2 in this mode.
Figure 24-11. Biphase Demodulation
CM31=SCI
SR-DATA
Counter 3
Timer 3
Q1=SI
mode
T3EX
Reset
T3I
Synchronize
8-bit shift register internal data input (SI) and the internal shift clock
(SCI) from the Timer 3
Biphase demodulation with Timer 3
0
0
Bit 7
0
1
Bit 6
1
1
Biphase demodulation mode
Bit 5
1
0
Bit 4
0
1
Bit 3
1
0
Bit 2
0
1
Bit 1
4551G–4BMCU–07/07
1
0
Bit 0
0