16-Bit, RISC, Microcontroller-Based,

Ultrasonic Distance-Measuring System

8

_______________________________________________________________________________________

Note 2: Gain adjust resolution typically ranges between 6.25% and 12.5%.

Note 3: LIN 2.0 specifies a maximim data rate of 20kbps. Higher data rates could be possible with compatible devices and suitable

line conditions.

ELECTRICAL CHARACTERISTICS (continued)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SPI INTERFACE TIMING (Figures 11 and 12)

SPI Master Operating

Frequency

8

MHz

SPI Slave Operating

Frequency

4

MHz

SCLK Output Pulse-Width

High/Low

- 25

ns

MOSI Output Hold Time

After SCLK Sample Edge

- 25

ns

MOSI Output Valid to Sample

Edge

- 25

ns

MISO Input Valid to SCLK

Sample Edge

25

ns

MISO Input Hold Time After

SCLK Sample Edge

0ns

SCLK Inactive to MOSI

Inactive

0ns

SCLK Input Pulse-Width

High/Low

ns

SS Active to First Shift Edge

ns

MOSI Input Setup Time to

SCLK Sample Edge

25

ns

MOSI Input Hold Time After

SCLK Sample Edge

25

ns

MISO Output Valid After

SCLK Shift Edge Transition

50

ns

SS Inactive Duration

25

ns

SCLK Inactive to SS Rising

Edge

25

ns

FLASH PROGRAMMING

Mass erase

200

Flash Erase Time

Page erase (512 bytes per page)

20

ms

Flash Programming Time

20µs per word

657

ms

Write/Erase Cycles

10,000

Cycles

Data Retention

Average temperature = +85°C

15

Years