ATAM894X-TNQY ATMEL [ATMEL Corporation], ATAM894X-TNQY Datasheet - Page 25
ATAM894X-TNQY
Manufacturer Part Number
ATAM894X-TNQY
Description
8k-flash Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATAM894X-TNQY.pdf
(97 pages)
- Current page: 25 of 97
- Download datasheet (2Mb)
6.2.2
4679D–4BMCU–05/05
Bi-directional Port 2
Figure 6-2.
As all other bi-directional ports, this port includes a bit-wise-programmable Control Register
(P2CR), which enables the individual programming of each port bit as input or output. It also
opens up the possibility of reading the pin condition when in output mode. This is a useful fea-
ture for self testing and for serial bus applications.
However, Port 2 has an increased drive capability and an additional low resistance pull-up/-
down transistor mask option.
Care should be taken connecting external components to BP20/NTE. During any reset phase,
the BP20/NTE input is driven towards V
pin must not be pulled down (active or passive) to V
resenting a resistor of less than 150 k . This prevents the circuit from unintended switching to
test mode enable through the application circuitry at pin BP20/NTE. Resistors less than 150 k
might lead to an undefined state of the internal test logic, thus disabling the application firmware.
To avoid any conflict with the optional internal pull-down transistors, BP20 handles the pull-down
options in a different way than all other ports. BP20 is the only port that switches off the pull-
down transistors during reset.
Master reset
OUT
IN
I/O Bus
Bi-directional Port 1
(Direction)
(Data out)
D
P1DATy
S
R
Reset
R
NQ
Q
Q
DD
by an additional internal strong pull-up transistor. This
(1)
Flash options
SS
during reset by any external circuitry rep-
(1)
(1)
Switched
pull-up
V
DD
Switched
(1)
pull-down
(1)
V
DD
ATAM894
Static
pull-up
BP1y
Static
pull-down
25
Related parts for ATAM894X-TNQY
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Atam894 8k-flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
Atmel CryptoMemory, 16Kbit
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontrollers
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
8-bit Atmel Microcontroller with 16/32/64/128K Bytes In-System Programmable Flash
Manufacturer:
ATMEL [ATMEL Corporation]
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet: