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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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WM8326 датащи(PDF) 49 Page - Wolfson Microelectronics plc |
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WM8326 датащи(HTML) 49 Page - Wolfson Microelectronics plc |
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49 / 255 page  Production Data WM8326 w PD, June 2012, Rev 4.0 49 14 INSTANTCONFIG™ (ICE) AND OTP MEMORY CONTROL 14.1 GENERAL DESCRIPTION The WM8326 is a highly configurable device which can be tailored specifically to the requirements of a complex system application. The sequencing and voltage control of the integrated DC-DC Converters and LDOs in power-up, shut-down and SLEEP conditions is crucial to the robust operation of the application. In development, the WM8326 allows designers to modify or experiment with different settings of the control sequences by writing to the applicable registers in the OFF state prior to commanding an ‘ON’ state transition. Configuration settings can also be stored on an external EEPROM and loaded onto the WM8326 as required, using the InstantConfig™ EEPROM (ICE) interface. For production use, the WM8326 provides an on-chip One-Time Programmable (OTP) memory, in which the essential parameters for starting up the device can be programmed. This allows the WM8326 to start up and shut down the system with no dependency on any other devices for application-specific configuration parameters. 14.2 ICE AND OTP MEMORY DEFINITION An illustration of the WM8326 memory locations is shown in Figure 18. The main Register Map of the WM8326 contains a block of data in a ‘Window’ area which is mirrored in the OTP and/or the ICE Memory. Data from the external ICE Memory can be loaded into the Window area. Data can be transferred from the Window into OTP Memory and also from the OTP Memory into the Window. The Window is called the Device Configuration Register Window (DCRW); the data in this Window is mirrored in other locations within the WM8326 Register Map. Register Map 00h 08h InstantConfig™ EEPROM (ICE) Memory OTP Page3 Data OTP Page 2 Data OTP Page 1 Data OTP Memory OTP Page 0 Data 00h 08h DCRW Page 4 Data DCRW Page 2 Data DCRW Page 1 Data DCRW Page 0 Data 10h 18h ICE Page 3 Data Power Management & Configuration Registers WM8326 DCRW Page 3 Data 10h Factory Set Data Unique ID User Configurable Key ICE Check ICE Page 2 Data ICE Page 4 Data 18h 20h 28h Note that the recommended external ICE memory is arranged in 8-bit words Figure 18 ICE and OTP Memory Layout The DCRW contains 5 pages of data, as illustrated in Figure 18. |
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