The Architecture of Electronic Data Carriers - RFID: Fundamentals and Applications in Contactless Smart Cards and Identification - page 269

R1
4R7

JP6

L1
Card L

R6 470R

D3
BAR42

D4
BAR42

R mode

CV1
6..60p

R3
1M

R5
1M

R9
1K

C4
10p

C6
10p

D6
3VB

C1
22p

JP7

C2
100p

C3
10n

R4
1M

R6
1M

R mode

Connect for
C mode only

R2
4K7

C mode

U4: A
74HC03

Subcarrier phase
JP5

VCC

VCC 1

2

U1
74HC4040

3

Phase + p1/2

10 9

7
5
3
4
13
12
1 15
1

CLK D1

D2
D3
D4
D5
D D7
D8
D9
D10
D11
D12

U3: D U2: B

74HC74 U4: A

74HC03

Phase 0 74HC00 U3: C

74HC00

13
12

11 10

9

4
5

8 12

11

9 6

U3: A
74HC00

D D

11 VCC

RST

1
2

CLK

3

U4: C
74HC03

8

U3: B
74HC00

D

9
10

4
5

8

6

U4: D
74HC03

2
3

JP10 JP4

D

5
6

12
13

Phase + p1
Phase 0

D
D

VCC

11

CLK

5
4
3
2
1

U2: A
74HC74

Test PICC ISO/IEC 14443-2

Figure 10.5 Example circuit of a HF interface in accordance with ISO 14443