9.1.3 Device Information Area (DIA)

The Device Information Area (DIA) is a dedicated region in the Program Flash Memory. The data are mapped from address 8100h to 813Fh. These locations are read-only and cannot be erased or modified. The DIA contains the Microchip Unique Identifier words, Temperature Indicator range data, and the Fixed Voltage Reference (FVR) voltage readings in millivolts (mV). The DIA Table holds the DIA information for the PIC16F181 family of microcontrollers.

Table 9-3. Device Information Area
Address Range	Name of Region	Standard Device Information
8100h - 8108h	MUI0	Microchip Unique Identifier (9 Words)
	MUI1
	MUI2
	MUI3
	MUI4
	MUI5
	MUI6
	MUI7
	MUI8
8109h	MUI9	Reserved (1 Word)
810Ah - 8111h	EUI0	Optional External Unique Identifier (8 Words)
	EUI1
	EUI2
	EUI3
	EUI4
	EUI5
	EUI6
	EUI7
8112h	TSLR1⁽¹⁾	Gain = $\frac{0.1 C \times 256}{c o u n t}$ (low range setting)
8113h	TSLR2⁽¹⁾	Temperature sensor ADC reading at 90°C (low range setting)
8114h	TSLR3⁽¹⁾	Offset (low range setting)
8115h	TSHR1⁽²⁾	Gain = $\frac{0.1 C \times 256}{c o u n t}$ (high range setting)
8116h	TSHR2⁽²⁾	Temperature sensor ADC reading at 90°C (high range setting)
8117h	TSHR3⁽²⁾	Offset (high range setting)
8118h	FVRA1X	ADC FVR1 output voltage for 1x setting (in mV)
8119h	FVRA2X	ADC FVR1 output voltage for 2x setting (in mV)
811Ah	FVRA4X	ADC FVR1 output voltage for 4x setting (in mV)
811Bh	FVRC1X	Comparator FVR2 output voltage for 1x setting (in mV)
811Ch	FVRC2X	Comparator FVR2 output voltage for 2x setting (in mV)
811Dh	FVRC4X	Comparator FVR2 output voltage for 4x setting (in mV)
811Eh - 811Fh	Reserved	Reserved (2 Words)
Note: TSLR: Addresses 8112h - 8114h store the measurements for the low range setting of the temperature sensor at V_DD = 3.0V, V_REF+ = 2.048V from FVR1. TSHR: Addresses 8115h - 8117h store the measurements for the high range setting of the temperature sensor at V_DD = 3.0V, V_REF+ = 2.048V from FVR1.