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AS5030

Datasheet - Application In formatio n

8.3 OTP Programming Connection

Programming of the AS5030 OTP memory does not require a dedicated programming hardware. The programming can be simply accomplished

over the serial 3-wire interface (see Figure 22) or the optional 2-wire interface (see Figure 8).

For permanent programming (command PROG OTP, #19H), a constant DC voltage of 8.0V ~ 8.5V (≥100mA) must be connected to pin #2

(PROG).

For temporary OTP write (“soft write”; command WRITE OTP, #1FH), the programming voltage is not required.

To secure unintentional programming, any modification of the OTP memory is only enabled after a special password (command #10H) has been

sent to the AS5030.

Figure 22. OTP Programming Connection

8.3.1 Programming in Daisy Chain Mode

Programming in Daisy chain mode is possible for both 3-wire and 2-wire mode (see Figure 17 and Figure 19). For temporary programming (soft

write), no additional connections are required. Programming is executed with the respective programming commands. For permanent

programming, the programming voltage must be applied on pin#2 (PROG) of the device to be programmed. It is also possible to apply the

programming voltage simultaneously to all devices, as the actual programming is only executed by a software command.

A parallel connection of all PROG-pins allows digital programming verification but does not allow analog programming verification.

If analog programming verification is required, each PROG pin must be selected individually for verification.

100n

CLK

DI O

+5 V

VDD

VSS

C 2

VDD

VSS

I/O

Output

8. 0 – 8.5V

PROG

10µF 100n

Micro

Controller

AS5030

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