6 Detailed Description

6.1 Overview

The Functional Block Diagram section presents the on-chip block level components of the TMF0008 device. The

TMF0008 has the following data components: a 64-bit factory-programmed ROM, containing 8-bit family code,

48-bit identification number and 8-bit CRC value, and 7680 bits of FRAM Data Memory. Power for read and write

operations is derived from the SDQ pin. An internal capacitor stores energy while the signal line is high and

releases energy during the low times of the SDQ pin, until the pin returns high to replenish the charge on the

capacitor.

6.2 Functional Block Diagram

TMF0008

RPUP ~ 500

µC

VPUP

GND

ESD

Internal

Charge

Storage

SDQ

Power

Conditioning

MCLK

DIGITAL

FRAM

8kb

OTP

64bit unique ID

6.3 Feature Description

6.3.1 7680-Bit FRAM

Table 6-1 is a memory map of the 7680-bit FRAM section of the TMF0008, configured as 30 pages of 32-bytes

each. Four adjacent pages form one 128-byte block. The 32-byte volatile scratchpad buffer is used when

programming the FRAM memory. The process for writing to the FRAM memory includes two steps. Data is first

written to the scratchpad buffer. The data is then verified by reading the scratchpad buffer that confirms proper

receipt of the data. If the buffer content is correct, a copy scratchpad command is issued to copy the scratchpad

buffer to the FRAM memory. This process verifies data integrity when programming the memory. The details for

programming and reading the 7680-bit FRAM portion of the TMF0008 are in the Memory Function Commands

section of this data sheet.

Table 6-1. FRAM Data Memory Map

ADDRESS RANGE

TYPE (1)

DESCRIPTION

PROTECTION CODES (NOTES)

0000h to 007Fh

R/(W)

Data Memory Pages 0 to 3 (Block 0)

(Protection controlled by address 03C0h)

0080h to 00FFh

R/(W)

Data Memory Pages 4 to 7 (Block 1)

(Protection controlled by address 03C1h)

0100h to 017Fh

R/(W)

Data Memory Pages 8 to 11 (Block 2)

(Protection controlled by address 03C2h)

0180h to 01FFh

R/(W)

Data Memory Pages 12 to 15 (Block 3)

(Protection controlled by address 03C3h)

0200h to 027Fh

R/(W)

Data Memory Pages 16 to 19 (Block 4)

(Protection controlled by address 03C4h)

0280h to 02FFh

R/(W)

Data Memory Pages 20 to 23 (Block 5)

(Protection controlled by address 03C5h)

0300h to 037Fh

R/(W)

Data Memory Pages 24 to 27 (Block 6)

(Protection controlled by address 03C6h)

0380h to 03BFh

R/(W)

Data Memory Pages 28 to 29 (Block 7)

(Protection controlled by address 03C7h)

(1)

R = Read, W = Write

TMF0008

SLVSIV3 – JULY 2025

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