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WM8321 数据表(PDF) 61 Page - Wolfson Microelectronics plc |
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WM8321 数据表(HTML) 61 Page - Wolfson Microelectronics plc |
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61 / 253 page  Production Data WM8321 w PD, February 2012, Rev 4.0 61 REGISTER FUNCTION REFERENCE GP6_PWR_DOM See Section 21.3 GP6_POL See Section 21.3 GP6_OD See Section 21.3 GP6_ENA See Section 21.3 GP6_FN [3:0] See Section 21.3 CLKOUT_SLOT [2:0] Clocking See Section 13.1 XTAL_ENA See Section 13.1 XTAL_INH See Section 13.1 WDOG_ENA Watchdog Timer See Section 25 LED1_SRC [1:0] System Status LED Drivers See Section 22.2 LED2_SRC [1:0] See Section 22.2 SYSOK_THR [2:0] Supply Voltage Monitoring See Section 24.4 Table 28 DCRW Page 3 14.6.5 DCRW PAGE 4 Page 4 of the DCRW occupies register addresses R30752 (7820h) to R30759 (7827h). This page of data is loaded from the third page of ICE memory (20h to 2Fh) when ‘ON’ state transition is scheduled in Development Mode. This page of data can also be loaded from ICE using the ICE Read command. Note that ICE Address 20h corresponds to bits 15:8 at the start address of DCRW Page 4; ICE Address 21h corresponds to bits 7:0 at the same DCRW address. The ICE_VALID_DATA register is used to hold a validation field for the ICE data contents. If the WM8321 configuration data is loaded from the external ICE in response to an ‘ON’ state transition request in Development Mode, then the ICE_VALID_DATA field is checked to confirm valid ICE data. The ICE data is deemed valid if the ICE_VALID_DATA field contains the value A596h. If the ICE is not connected or contains invalid data, then the WM8321 remains in the OFF power state until a Device Reset. The ICE_VALID_DATA register is defined in Table 29. ADDRESS BIT LABEL DEFAULT DESCRIPTION R30759 (7827h) ICE CHECK DATA 15:0 ICE_VALID_ DATA [15:0] 0000h This field is checked in development mode when an ‘ON’ transition is requested. A value of A596h is required to confirm valid data. Table 29 ICE Registers - DCRW Page 5 |
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