37.3.2 Peripheral Module Disable (PMD)

All peripheral modules (except for I/O ports) in dsPIC33A devices have a control bit that can be selectively disabled to reduce power consumption. These bits, known as the Peripheral Module Disable (PMD) bits, are generically named “xxxMD” (where “xxx” is the mnemonic version of the module’s name). These bits are located in the PMDx Special Function Registers (SFRs). The PMD bit must be set (= 1) to disable the module. The PMD bit completely shuts down the peripheral, effectively powering down all circuits and removing all clock sources. By default, all peripherals are not disabled by PMD.