AN3255

Application description

Doc ID 17784 Rev 1

9/24

Figure 3.

TAG state transition diagram

1.3

Hardware requirements

The following STM8S-DISCOVERY on-board resources are used:

●

LED LD1

Refer Table 2, Table 3, Table 4, and Table 5 for the list of additional hardware required to

make this application software run on the STM8S-DISCOVERY.

Power-off

Ready

Inventory

Selected

Deselected

Desactivated

Select(Chip_ID)

Read_block()

Write_block()

Get_UID()

Completion()

Select(Chip_ID)

Selct( != Chip_ID)

Select

(Chip_ID)

Reset_to_inventory()

Initiate() or Pcall16()

or Slot_marker(SN) or

Select(wrong Chip_ID)

Initiate()

On field

Out of

field

Out of

field

Out of

field

Out of

field

Out of

field

ai18400

Table 2.

List of PCB passive components

Component description

Value

Comment

Resistors

R1

N/A

Hardwired addressing of the

CR14 (bits b3, b2, and b1 of the

Allow up to 7 CR14 readers to

bus

R2

0

Ω

R3

N/A

R4

0

Ω

R5

N/A

R6

0

Ω

R7

0

Ω

-