Renesas M16C FAMILY Bedienungsanleitung PDF herunterladen (Seite 15)

■ Data Flash and BackGround Operation (BGO)

1 10 Data n’

1 10 Data n’’

Typical Flash Memory Operation:

Program

Execution

(1)

CPU

Program

Execution

(2)

Hold

State

Program

Execution

(3)

Hold

State

Data

Flash

Data

Write

Write Request

Data

Erase

Erase Request

Flash Memory with BackGround Operation (BGO):

Program

Execution

(1)

CPU

Program

Execution

(2)

Program

Execution

(3)

Data

Flash

Data

Write

Request

Data

Erase

Request

Shorter processing time

Data Flash

• Up to four blocks of 1KB each of Data Flash are available for R8C

(two blocks of 4KB for other devices) for storage of non-volatile data

• Single-byte writing capable of wear-leveling format

(example of Data Storage shown)

BGO

• BGO (BackGround Operation) allows Erasing or Programming

of Data Flash while executing application code.

Suspend Mode

• Erase operation of Flash Memory (Program or Data block)

can be suspended automatically to Read/Execute from

different Flash Blocks

• Erase operation can also be suspended to

Write different Flash Blocks (Program or Data)

Program

Block A

Interrupt Request

Erase

Program

Block B or

Data Block

SUSPEND

Erase

Read/Write

Suspend Mode

Data Block A

Interrupt Request

Erase

Data Block B

Program Block

SUSPEND

Erase

Read/Write

Memory Map

RAM

Data

Flash

Program

Flash

x KB

1KB

4KB (Block 2)

2KB (Block 1)

2KB (Block 0)

Example of Data Storage format

User-assigned

record label

(0-254)

Size in

WORDs

(1-256)

User data

for that

record

Address

Update

1 10 Data n

Data n’’ is latest value

■ High-Precision High-Speed On-Chip Oscillator

• The 40MHz clock generated can be used to operate 16-bit timers directly

VCC TA

Power Supply Voltage Dependency

R8C/20-29 High-Speed On-Chip Oscillator

Voltage Characteristics (40MHz)

(TA=25°[email protected] to 5.5V, TYP)

Temperature Dependency

R8C/20-29 High-Speed On-Chip Oscillator

Temperature Characteristics (40MHz)

(VCC=5.0V@-45 to 135°C, typ.

Oscillation Error [%]

-50°C

0°C

25°C

2.5V

50°C

75°C

100

100°C

125

125°C

-25

-25°C

0°C

3.0V

3.5V

4.0V

4.5V

5.0V

5.5V

25°C50°C75°C 100°C

125°C 150°C

3.0%

2.5%

2.0%

1.5%

1.0%

0.5%

0.0%

-0.5%

-1.0%

-1.5%

-2.0%

-2.5%

-3.0%

3.0%

2.5%

2.0%

1.5%

1.0%

0.5%

0.0%

-0.5%

-1.0%

-1.5%

-2.0%

-2.5%

-3.0%

3.0V2.5V 3.5V 4.0V 4.5V 5.0V 5.5V 6.0V

-25°C

High Accuracy

23 5 5

-5

-3

-20 -10 0 +25 +40 +85

-1

-2

Temp (C)

Vcc (V)

% Accuracy

R8C/3x

Typical

MCU

+/- 1 %

* OCO characteristics based on evaluation data

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 45 46

Kommentare zu diesen Handbüchern

Keine Kommentare

Renesas M16C FAMILY Bedienungsanleitung Seite 15

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Vernetzung Renesas M16C FAMILY