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MEC1322 数据表(PDF) 97 Page - Microchip Technology |
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MEC1322 数据表(HTML) 97 Page - Microchip Technology |
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97 / 456 page  2014 - 2015 Microchip Technology Inc. DS00001719D-page 97 MEC1322 5.11.5 MCHP TEST REGISTER 5.11.6 MCHP TEST REGISTER 1:0 Clock_Control This field controls when the host interface will permit the internal ring oscillator to be shut down. The choices are as follows: 0h: Reserved 1h: The host interface will permit the internal clocks to be shut down if the CLKRUN# signals “CLOCK STOP” and there are no pending serial interrupt request or DMA requests from devices associated with the device. The CLKRUN# signals “CLOCK STOP” by CLKRUN# being high for 5 LPCCLK’s after the raising edge of CLKRUN# 2h: The host interface will permit the ring oscillator to be shut down after the completion of every LPC transaction. This mode may cause an increase in the time to respond to LPC transactions if the ring oscillator is off when the LPC transaction is detected. 3h: The ring oscillator is not permitted to shut down as long as the host interface is active. When the ACTIVATE bit in the LPC Activate Register is 0, the Host Interface will permit the ring oscillator to be shut down and the Clock_Control Field is ignored. The Clock_Con- trol Field only effects the Host Interface when the ACTIVATE bit in the LPC Activate Register is 1. Although the Host Interface can permit the internal oscillator to shut down, it cannot turn the oscillator on in response to an LPC transac- tion that occurs while the oscillator is off. In order to restart the oscil- lator in order to complete an LPC transaction, EC firmware must enable a wake interrupt on the LPC LFRAME# input. See the Appli- cation Note in Section 15.8.1, "WAKE Generation" for details. R/W 0h VCC1_ RESET Offset 14h Bits Description Type Default Reset Event 31:8 RESERVED RES - - 7:0 MCHP Reserved R 0h VCC1_R ESET Offset 18h Bits Description Type Default Reset Event 31:2 RESERVED RES - - 1 MCHP Reserved R/W 0h VCC1_R ESET 0 MCHP Reserved R/W 0h VCC1_R ESET Offset 10h Bits Description Type Default Reset Event |
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