T48C862M-R4-TNQ Atmel, T48C862M-R4-TNQ Datasheet - Page 29

• Manufacturer Part Number: T48C862M-R4-TNQ
• Description: IC MON TIRE PRESS 433MHZ 24-SOIC
• Manufacturer: Atmel

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: -

System Configuration
Register (SC)
Power-down Modes
4551C–4BMCU–01/04
Table 7. Oscillator Select
The sleep mode is a shut-down condition which is used to reduce the average system
power consumption in applications where the microcontroller is not fully utilized. In this
mode, the system clock is stopped. The sleep mode is entered via the SLEEP instruc-
tion. This instruction sets the interrupt enable bit (I) in the condition code register to
enable all interrupts and stops the core. During the sleep mode the peripheral modules
remain active and are able to generate interrupts. The microcontroller exits the sleep
mode by carrying out any interrupt or a reset.
The sleep mode can only be kept when none of the interrupt pending or active register
bits are set. The application of the $AUTOSLEEP routine ensures the correct function of
the sleep mode. For standard applications use the $AUTOSLEEP routine to enter the
power-down mode. Using the SLEEP instruction instead of the $AUTOSLEEP following
an I/O instruction requires to insert 3 non-I/O instruction cycles (for example NOP NOP
NOP) between the IN or OUT command and the SLEEP command.
The total power consumption is directly proportional to the active time of the microcon-
troller. For a rough estimation of the expected average system current consumption, the
following formula should be used:
I
I
DD
total
Note:
Mode
SC: write
BOT
OS1
OS0
depends on V
1
2
3
4
(V
DD
, f
If bit CCS = 0 in the CM register the RC-oscillator 1 always stops.
syscl
OS1
1
0
1
0
Brown-Out Threshold
BOT = 1, low brown-out voltage threshold (1.7 V)
BOT = 0, high brown-out voltage threshold (2.0 V)
Oscillator Select 1
Oscillator Select 0
) = I
DD
Sleep
and f
BOT
Bit 3
OS0
1
1
0
0
+ (I
syscl
DD
Bit 2
Input for SUBCL
–
t
32 kHz
active
C
C
C
in
in
in/
T48C862-R4 [Preliminary]
/16
/16
16
Bit 1
OS1
/t
total
)
Bit 0
OS0
Selected Oscillators
RC-oscillator 1 and external input clock
RC-oscillator 1 and RC-oscillator 2
RC-oscillator 1 and 4-MHz crystal oscillator
RC-oscillator 1 and 32-kHz crystal
oscillator
Primary register address: "3"hex
Reset value: 1x11b
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