MCP47FVB02 datasheet(31/92 Pages) MICROCHIP

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DS20005405A-page 31

MCP47FVBXX

4.2

Device Memory

User memory includes two types of memory:

• Volatile Register Memory (RAM)

• Device Configuration Memory

Each memory address is 16 bits wide. The memory

mapped register space is shown in Table 4-1. (see

Section 4.2.2 “Device Configuration Memory”

4.2.1

VOLATILE REGISTER MEMORY

(RAM)

There are up to six Volatile Memory locations:

• DAC0 and DAC1 Output Value registers

• VREF Select register

• Power-Down Configuration register

• Gain and Status register

• WiperLock Technology Status register

The volatile memory starts functioning when the

device VDD is at (or above) the RAM retention voltage

(VRAM). The volatile memory will be loaded with the

default device values when the VDD rises across the

VPOR/VBOR voltage trip point.

TABLE 4-1:

MEMORY MAP (x16)

Function

00h Volatile DAC0 register

10h Reserved

01h Volatile DAC1 register

11h

Reserved

02h Reserved

12h Reserved

03h Reserved

13h Reserved

04h Reserved

14h Reserved

05h Reserved

15h Reserved

06h Reserved

16h Reserved

07h Reserved

17h Reserved

08h VREF register

18h Reserved

09h Power-Down register

19h Reserved

0Ah Gain and Status register

1Ah Reserved

0Bh WiperLock Technology Status register

1Bh Reserved

0Ch Reserved

1Ch Reserved

0Dh Reserved

1Dh Reserved

0Eh Reserved

1Eh Reserved

0Fh Reserved

1Fh Reserved

Volatile Memory address range

Nonvolatile Memory address range(1)

Note 1:

Nonvolatile memory address range is shown to reflect memory map compatibility with the MCP47FEBXX family

of devices.

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