M24LR64-RDW6T/2 STMicroelectronics, M24LR64-RDW6T/2 Datasheet - Page 40

• Manufacturer Part Number: M24LR64-RDW6T/2
• Description: 13.56MHZ 64KBIT EEPROM 8 TSSOP
• Manufacturer: STMicroelectronics

Specifications of M24LR64-RDW6T/2

• Featured Product: STM32 Cortex-M3 Companion Products
• Rf Type: Read / Write
• Frequency: 13.56MHz
• Features: 64 Kbit EEPROM
• Package / Case: 8-TSSOP
• Memory Size: 64 KB
• Organization: 2 K x 32
• Interface Type: I2C
• Maximum Clock Frequency: 400 KHz
• Access Time: 900 ns
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Maximum Operating Current: 600 uA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10487-2

Communication signal from VCD to M24LR64-R
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Communication signal from VCD to M24LR64-R
Communications between the VCD and the M24LR64-R takes place using the modulation
principle of ASK (Amplitude Shift Keying). Two modulation indexes are used, 10% and
100%. The M24LR64-R decodes both. The VCD determines which index is used.
The modulation index is defined as [a – b]/[a + b] where a is the peak signal amplitude and
b, the minimum signal amplitude of the carrier frequency.
Depending on the choice made by the VCD, a “pause” will be created as described in
Figure 14
The M24LR64-R is operational for any degree of modulation index from between 10% and
30%.
Figure 14. 100% modulation waveform
The clock recovery shall be operational after t
105%
95%
60%
and
5%
Amplitude
a
b
Carrier
Figure
15.
Doc ID 15170 Rev 12
t
1
t
2
t
4
4
t
max.
3
t
t
t
t
t
1
2
3
4
Min (µs)
ai15793
6,0
2,1
0
0
M24LR64-R
Max (µs)
9,44
4,5
0,8
t
1