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MIC3002GML Datasheet(PDF) 52 Page - Micrel Semiconductor |
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MIC3002GML Datasheet(HTML) 52 Page - Micrel Semiconductor |
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52 / 65 page  Micrel, Inc. MIC3002 July 2007 52 M9999-073107-B hbwhelp@micrel.com or (408) 955-1690 USER Control Register (USRCTL) D[7] read/write D[6] PORM read/write D[5] PORS read/write D[4] IE read/write D[3] APCSEL[1] read/write D[2] APCSEL[0] read/write D[1] MODSEL[1] read/write D[0] MODSEL[0] read/write Default Value 0010 0000b = 20h Serial Address A2h Byte Address 255 = FFh if OMCFG6 bit 2 = 0 222 = DEh if OMCFG6 bit 2 = 1 This register provides for control of the nominal APC setpoint and management of interrupts by the end-user. APCSEL[1:0] select which of the APC setpoint registers, APCSET0, APCSET1, or APCSET2 are used as the nominal automatic power control setpoint. IE must be set for any interrupts to occur. If PORM is set, the power-on event will generate an interrupt and warm resets using RST will not generate a POR interrupt. When a power-on interrupt occurs, assuming PORM=1, PORS will be set. PORS will be cleared and the interrupt output de-asserted when USRCTL is read by the host. If IE is set while /INT is asserted, /INT will be de-asserted. The host must still clear the various status flags by reading them. If PORM is set following the setting of PORS, PORS will remain set, and /INT will not be de-asserted, until USRCTL is read by the host. PORM, IE, and APCSEL are non-volatile and will be maintained through power and reset cycles. A valid USER password is required for access to this register. Bit Function Operation D[7] Reserved Always write as zero; reads undefined. D[6] PORM Power-on interrupt mask 1 = POR interrupts enabled; 0 = disabled; read/write; non-volatile. D[5] PORS Power-on interrupt flag 1 = POR interrupt occurred; 0 = no POR interrupt; read-only. D[4] IE Global interrupt enable 1 = enabled; 0 = disabled; read/write; non-volatile. D[3:2] APCSEL Selects APC setpoint register 00 = APCSET0, 01 = APCSET1, 10 = APCSET2; 11 = reserved; read/write; non-volatile. D[1:0] MODSEL Selects Modulation setpoint register 00 = MODSET0, 01 = MODSET1, 10 = MODSET2, 11 = reserved; read/write; non volatile. OEM Configuration Register 0 (OEMCFG0) D[7] RST write only D[6] ZONE read/write D[5] DFLT read only D[4] OE reserved D[3] MODREF reserved D[2] VAUX[2] read/write D[1] VAUX[1] read/write D[0] VAUX[0] read/write Default Value 0000 0000b = 00h Serial Address A6h Byte Address 00 = 00h A write to OEMCFG0 will result in any A/D conversion in progress being aborted and the result discarded. The A/D will begin a new conversion sequence once the write operation is complete. All bits in OEMCFG0 are non-volatile except DFLT and RST. A valid OEM password is required for access to this register. Bit(s) Function Operation D[7] RST 0 = no action; 1 = reset; write-only. D[6] ZONE Selects temperature zone. 0 = internal; 1 = external; non-volatile. D[5] DFLT Diode fault flag. 1 = diode fault; 0 = OK. D[4] OE Output enable for SHDN, VMOD, 1 = enabled; 0 = hi-Z; non-volatile. |
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