at89lp428-25pu ATMEL Corporation, at89lp428-25pu Datasheet - Page 37
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
at89lp428-25pu
Manufacturer Part Number
at89lp428-25pu
Description
8-bit Microcontroller With 4k/8k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT89LP428-25PU.pdf
(149 pages)
- Current page: 37 of 149
- Download datasheet (5Mb)
10.1.2
10.1.3
3654A–MICRO–8/09
Input-only Mode
Open-drain Output
The input only port configuration is shown in
input includes a Schmitt-triggered input for improved input noise rejection. The input circuitry of
P3.2, P3.3, P3.6, P4.0 and P4.1 is not disabled during Power-down (see
fore these pins should not be left floating during Power-down when configured in this mode.
Figure 10-2. Input Only
Figure 10-3. Input Circuit for P3.2, P3.3 and P3.6
The open-drain output configuration turns off all pull-ups and only drives the pull-down transistor
of the port pin when the port latch contains a logic “0”. To be used as a logic output, a port con-
figured in this manner must have an external pull-up, typically a resistor tied to V
down for this mode is the same as for the quasi-bidirectional mode. The open-drain port configu-
ration is shown in
Power-down (see
down when configured in this mode.
Figure 10-4. Open-drain Output
From Port
Register
Figure
Figure
Input
Data
Input
Data
10-3) and therefore these pins should not be left floating during Power-
10-4. The input circuitry of P3.2, P3.3 and P3.6 is not disabled during
PWD
Input
Data
Figure
PWD
10-2. The output drivers are tristated. The
AT89LP428/828
Port
Pin
Port
Pin
Figure
Port
Pin
10-3) and there-
CC
. The pull-
37
Related parts for at89lp428-25pu
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![AT89LP428](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![AT89LP428-20MU](/images/no-image3.png)
Part Number:
Description:
8-bit Microcontroller with 4K/8K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B-P](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
![TDA4470](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
![ATF22V10B-25PC](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
![AT89C51ED2-IM](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
![AT24C01](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: