T48C862M-R4-TNQ Atmel, T48C862M-R4-TNQ Datasheet - Page 34
T48C862M-R4-TNQ
Manufacturer Part Number
T48C862M-R4-TNQ
Description
IC MON TIRE PRESS 433MHZ 24-SOIC
Manufacturer
Atmel
Datasheet
1.T48C862M-R4-TNS.pdf
(107 pages)
Specifications of T48C862M-R4-TNQ
Frequency
433MHz
Modulation Or Protocol
FM, FSK
Data Rate - Maximum
32 kBaud
Power - Output
10dBm
Current - Transmitting
9.5mA
Data Interface
PCB, Surface Mount
Antenna Connector
PCB, Surface Mount
Memory Size
1KB EEPROM, 1KB RAM
Voltage - Supply
2 V ~ 4 V
Operating Temperature
-40°C ~ 125°C
Package / Case
24-SOIC (0.200", 5.30mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
-
Applications
-
- Current page: 34 of 107
- Download datasheet (2Mb)
Bi-directional Port 2
34
T48C862-R4 [Preliminary]
Figure 28. Bi-directional Port 1
As all other bi-directional ports, this port includes a bitwise programmable Control Reg-
ister (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 feature 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.
are should be taken connecting external components to BP20/NTE. During any reset
phase, the BP20/NTE input is driven towards V
transistor. This pin must not be pulled down (active or passive) to V
any external circuitry representing a resistor of less than 150 k . This prevents the cir-
cuit 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 inter-
nal 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.
Figure 29. Bi-directional Port 2
Master reset
OUT
IN
I/O Bus
I/O Bus
I/O Bus
Master reset
I/O Bus
(Direction)
(Data out)
P2DATy
D
D
P2CRy
S
S
(Direction)
Q
Q
(Data out)
P1DATy
D
S
R
Reset
R
NQ
Q
Q
*
Configurable
*) Configurable
DD
by an additional internal strong pull-up
*
*
*
*
* *
Switched
pull-up
Switched
Switched
pull-down
*
*
pull-up
V DD
V
Switched
pull-down
*
*
DD
V DD
SS
*
*
4551C–4BMCU–01/04
BP2y
Static
Pull-up
Static
Pull-down
during reset by
V
DD
Static
pull-up
BP1y
Static
pull-down
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