ATTINY22L_1 datasheet(40/56 Pages) ATMEL

No de pièce	ATTINY22L

Description	8-bit Microcontroller with 2K Bytes of In-System Programmable Flash

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Fabricant	ATMEL [ATMEL Corporation]

Site Internet	http://www.atmel.com

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ATtiny22L

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Data Polling EEPROM

When a byte is being programmed into the EEPROM, reading the address location being programmed will give the value

P1 until the auto-erase is finished, and then the value P2. See Table 16 for P1 and P2 values.

At the time the device is ready for a new EEPROM byte, the programmed value will read correctly. This is used to deter-

mine when the next byte can be written. This will not work for the values P1 and P2, so when programming these values,

the user will have to wait for at least the prescribed time t

WD_PROG before programming the next byte. See Table 19 for

t

WD_PROG value. As a chip-erased device contains $FF in all locations, programming of addresses that are meant to contain

$FF, can be skipped. This does not apply if the EEPROM is reprogrammed without first chip-erasing the device.

Data Polling Flash

When a byte is being programmed into the Flash, reading the address location being programmed will give the value $FF.

At the time the device is ready for a new byte, the programmed value will read correctly. This is used to determine when the

next byte can be written. This will not work for the value $FF, so when programming this value, the user will have to wait for

at least t

WD_PROG before programming the next byte. As a chip-erased device contains $FF in all locations, programming of

addresses that are meant to contain $FF, can be skipped.

Figure 33. Low-Voltage Serial Downloading Waveforms

Table 16. Read back value during EEPROM polling

Part

P1

P2

ATtiny22L

$00

$FF

MSB

LSB

SERIAL CLOCK INPUT

PB2(SCK)

SERIAL DATA INPUT

PB0(MOSI)

SERIAL DATA OUTPUT

PB1(MISO)

Numéro de pièce similaire - ATTINY22L_1

Fabricant	No de pièce	Fiches technique	Description
ATMEL Corporation	ATTINY22L-1PC	252Kb / 11P	8-bit Microcontroller with 2K Bytes of In-System Programmable Flash
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Description similaire - ATTINY22L_1

Fabricant	No de pièce	Fiches technique	Description
ATMEL Corporation	AT90S2313	2Mb / 8P	8-bit Microcontroller with 2K Bytes of In-System Programmable Flash
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ATTINY22L Fiches technique(PDF) 40 Page - ATMEL Corporation

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