ATAM862P-TNQY8D Atmel, ATAM862P-TNQY8D Datasheet - Page 36

• Manufacturer Part Number: ATAM862P-TNQY8D
• Description: IC MCU FLASH 4K TX 868MHZ 24SSOP
• Manufacturer: Atmel

Specifications of ATAM862P-TNQY8D

• Applications: UHF ASK/FSK
• Core Processor: MARC4
• Program Memory Type: FLASH (4 kB)
• Controller Series: MARC4 4-Bit
• Ram Size: 256 x 4
• Interface: SSI
• Number Of I /o: 11
• Voltage - Supply: 1.8 V ~ 4 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 24-SSOP
• Processor Series: ATAM862x
• Core: MARC4
• Data Bus Width: 4 bit
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

22.2
36
Bi-directional Port 2
ATAM862-8
Figure 22-1. Bi-directional Port 1
As all other bi-directional ports, this port includes a bitwise 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.
Port 2, however, has an increased drive capability and an additional low resistance
pull-up/pull-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
(Direction)
(Data out)
P1DATy
D
S
R
Reset
R
NQ
Q
Q
DD
by an additional internal strong pull-up transistor. This
*) Configurable
SS
during reset by any external circuitry rep-
*
* *
Switched
pull-up
V DD
Switched
pull-down
*
*
V DD
4590G–4BMCU–06/07
Static
pull-up
BP1y
Static
pull-down