High power consumption problem in sleep mode with Atmega328P-MMH 28MI

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1

Hi

I have a standard Atmega328P 28 pin which is all going great on 3.3v @ 8MHz and goes into deep sleep of 0.002mA.
So I want to put the program into a 28MI size chip.

  1. First loaded program and the CPU, ran very slow. Think it is set to standard clock at 1MHz
  2. Load bootloader into 28MI
  3. Program runs, but sleep is 0.188mA

I think it might have something to do with the hardware in Arduino see below, but I am unsure.
Also I have pasted the sleep code FYI

Thanks in advance
James

unoat8.name=Arduino Uno Targeted for 8 MHz

unoat8.upload.protocol=arduino
unoat8.upload.maximum_size=30256
unoat8.upload.speed=57600
unoat8.bootloader.low_fuses=0xff
unoat8.bootloader.high_fuses=0xde
unoat8.bootloader.extended_fuses=0x05
unoat8.bootloader.path=optiboot
unoat8.bootloader.file=optiboot_atmega328.hex
unoat8.bootloader.unlock_bits=0x3F
unoat8.bootloader.lock_bits=0x0F
unoat8.build.mcu=atmega328p
unoat8.build.f_cpu=8000000L
unoat8.build.core=arduino
unoat8.build.variant=standard

void CPU_Sleep()
{                     
        Serial.end();                         // Shut down serial port         
        MCUCR = bit (BODS) | bit (BODSE);
        MCUCR = bit (BODS);
        PRR = 0xff;            // Power reduction mode   
        
         sleep.pwrDownMode(); //set sleep mode, deeeeeep sleeep
         sleep.sleepInterrupt(1,FALLING); //sleep intill....INT starts falling LOW, eg a new TAG is touched or switch to ground  
          // WAKE up from change in interrupt, either by TAG or button going on
        
        PRR = 0x00;                          // Set up  
        Serial.begin(9600);                  // Set up serial port
}