WM8311 datasheet(61/302 Pages) WOLFSON

61 / 302 page

Pre-Production

WM8311

PP, May 2012, Rev 3.1

Interrupt event; the host processor should read the OTP/ICE Interrupt event flags to confirm the

OTP/ICE command status following the assertion of the IRQ

¯¯¯ pin.

The programming supply voltage PROGVDD is required for the OTP Write commands and the OTP

Finalise command. It is also necessary to overdrive the LDO12VOUT pin from an external supply.

See Section 6 for details of the required supply voltages.

14.4.1 ENTERING / EXITING THE PROGRAM STATE

The ICE and OTP commands are only supported when the WM8311 is in the PROGRAM state. The

WM8311 can only enter the PROGRAM state as a transition from the OFF state. This is commanded

by setting the OTP_PROG register bit.

Important note - when the PROGRAM state is selected, the WM8311 will read all pages of the OTP

memory into the corresponding pages of the DCRW. This is required in order to confirm if the OTP

contents have already been finalised (see Section 14.4.5). The previous contents of the DCRW

registers will be lost when the PROGRAM state is entered.

The transition into the PROGRAM state can be confirmed by reading the MAIN_STATE register field

as defined in Section 11.2. When the MAIN_STATE register reads back a value of 01011, then the

WM8311 is in the PROGRAM state.

In the PROGRAM state, the ICE and OTP commands are initiated by further writes to the OTP

Control Register (R16394), as described in the following sections.

To exit the PROGRAM state and resume normal operations, a Device Reset must be scheduled.

14.4.2 OTP / ICE READ COMMAND

The Read command loads either one or all data pages from the ICE or OTP into the corresponding

page(s) of the DCRW. The Read commands are selected by writing 1 to the OTP_READ bit.

To read the OTP, the OTP_MEM bit should be set to 1. To read the ICE, the OTP_MEM bit should be

set to 0.

The Read Margin Level is selected by setting the OTP_READ_LVL. Note that this register relates to

the OTP only; it has no effect on ICE Read commands. The recommended setting for the OTP Read

command is ‘Normal’ level. The OTP_READ_LVL field should be set to 00b.

To read a single memory page, the applicable page is selected by setting the OTP_PAGE field. To

read all memory pages, the OTP_BULK bit should be set to 1.

Note that the OTP_PAGE field is defined differently for ICE pages and for OTP pages, as detailed in

Section 14.4.6.

All other bits in the OTP Control Register should be set to 0 when a Read command is issued. (Note

that OTP_PROG should be set to 0 when a Read command is issued.)

For typical applications, the Bulk Read commands are recommended. The OTP Control Register

contents for the OTP / ICE Bulk Read Commands are detailed in Table 23.

READ COMMAND

OTP CONTROL REGISTER VALUE

ICE Read All

0120h

OTP Read All

2120h

Table 23 OTP / ICE Read Command

14.4.3 OTP WRITE COMMAND

The Write command programs one or all data pages of the OTP with data from the corresponding

page(s) of the DCRW. The Write commands are selected by writing 1 to the OTP_WRITE bit.

The OTP memory is selected by setting the OTP_MEM bit to 1. (Note that the WM8311 does not

support programming the external ICE memory.)

To write a single memory page, the applicable page is selected by setting the OTP_PAGE field. To

write all memory pages, the OTP_BULK bit should be set to 1.

WM8311 Datasheet(PDF) 61 Page - Wolfson Microelectronics plc

WM8311 Datasheet(HTML) 61 Page - Wolfson Microelectronics plc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL