MEC1404 Datasheet, PDF (25/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
2.8 Non Backdrive Protected Pins
TABLE 2-1: lists pins which do not have backdrive protection. If the power supply used to power the buffer of the pin
(VTR or VTR_33_18) is off none of these pins are allowed to be above 0V to prevent back-drive onto the associated
power supply. The Power Supply used to power the buffer is shown in the Signal Power Well column of the Pin Multi-
plexing Tables in Section 2.0 “Pin Configuration”.
TABLE 2-1: MEC140X/1X NON BACKDRIVE PROTECTED PINS
Pin Name
DAC_VREF
GPIO160/DAC_0
GPIO161/DAC_1
GPIO165/CMP_VREF0
GPIO166/CMP_VREF1/UART_CLK
GPIO020/CMP_VIN0
GPIO021/CMP_VIN1
GPIO035/SB-TSI_CLK
GPIO033/PECI_DAT/SB_TSI_DAT
VREF_CPU
ADC_VREF
GPIO153/ADC4
GPIO154/ADC3
GPIO155/ADC2
GPIO122/ADC1
GPIO121/ADC0
GPIO022/ADC5
GPIO023/ADC6/A20M
GPIO024/ADC7
GPIO040/LAD0
GPIO041/LAD1
GPIO042/LAD2
GPIO043/LAD3
GPIO063/SER_IRQ
XTAL1
XTAL2
2.9 Pin Description
Note: See Section 2.3, "Notes for Tables in this Chapter," on page 13 for notes that are referenced in the Pin
Description table.
Interface
Analog Data Acquisition
Interface
Signal Name
ADC0
Description
ADC channel 0
Notes
Note 8
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