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MIC3000 Datasheet(PDF) 56 Page - Micrel Semiconductor |
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MIC3000 Datasheet(HTML) 56 Page - Micrel Semiconductor |
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56 / 68 page  MIC3000 Micrel M9999-101204 56 October 2004 Fault Suppression Timer (FLTTMR) Fault suppression interval in increments of 0.5ms D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] read/write read/write read/write read/write read/write read/write read/write read/write Default Value 0000 0000b = 00h Serial Address A6h = 1010011b Byte Address 10 = 0Ah Saturation faults are suppressed for a time, tFLTTMR, following laser turn-on. This avoids nuisance tripping while the APC loop starts up. The length of this interval is (FLTTMR×0.5ms), typical. A value of zero will result in no fault sup- pression. A valid OEM password is required for access to this register. This register is non-volatile and will be main- tained through power and reset cycles. Fault Mask (FLTMSK) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] OEMIM POHE SATMSK TXMSK IAMSK DFMSK read/write read/write reserved reserved read/write read/write read/write read/write Default Value 0000 0000b = 00h Serial Address A6h = 1010011b Byte Address 11 = 0Bh A valid OEM password is required for access to this register. This register is non-volatile and will be maintained through power and reset cycles. Bit Function Operation D[7] OEMIM OEM interrupt mask bit 1 = masked; 0 = enabled; Read/write; non-volatile. D[6] POHE OEM Power-on Hour Meter enable bit 1 = enabled; 0 = disabled; Read/write; non-volatile. D[5:4] D[5:4] Reserved Always write as zero; reads undefined. D[3] SATMSK APC saturation fault mask bit 1 = masked; 0 = enabled; Read/write; non-volatile. D[2] TXMSK High TX optical power fault mask bit 1 = masked; 0 = enabled; Read/write; non-volatile. D[1] IAMSK Bias current high alarm mask bit 1 = masked; 0 = enabled; Read/write; non-volatile. D[0] DFMSK Diode fault mask bit 1 = masked; 0 = enabled; Read/write; non-volatile. OEM Password Setting (OEMPWSET) D[7] D[6] D[5] D[4] D[3] D[2] D[1] D[0] read/write read/write read/write read/write read/write read/write read/write read/write Default Value 0000 0000b = 00h Serial Address A6h = 1010011b Byte Address 12 - 15 = 0Fh - 0Fh; 0Ch = MSB This four-byte field is the password required for access to the OEM area of the MIC3000’s memory and registers. The byte at address 250 (FAh) is the most significant byte. This field is compared to the four-byte OEMPW field at serial address A2h, byte 120 to 123. If the two fields match, access is allowed to the OEM areas of the MIC3000 non-volatile memory at serial addresses A4h and A6h. The OEM password may be set by writing the new value into OEMPWSET. The new password will not take effect until after a power-on reset occurs or a warm reset is performed using the RST bit in OEMCFG0. This allows the new password to be verified before it takes effect. These registers are non-volatile and will be maintained through power and reset cycles. A valid OEM password is required for access to this register. |
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