T48C862M-R4-TNQ Atmel, T48C862M-R4-TNQ Datasheet - Page 26

• 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: -

External Input Clock
RC-oscillator 2 with External
Trimming Resistor
26
T48C862-R4 [Preliminary]
Figure 21. RC-oscillator 1
The OSC1 or OSC2 (mask option) can be driven by an external clock source provided it
meets the specified duty cycle, rise and fall times and input levels. Additionally, the
external clock stage contains a supervisory circuit for the input clock. The supervisor
function is controlled via the OS1, OS0 bit in the SC register and the CCS bit in the
CM register. If the external input clock is missing for more than 1 ms and CCS = 0 is set
in the CM register, the supervisory circuit generates a hardware reset.
Figure 22. External Input Clock
Table 5. Supervisor Function Control Bits
The RC-oscillator 2 is a high resolution trimmable oscillator whereby the oscillator fre-
quency can be trimmed with an external resistor between OSC1 and V
configuration, the RC-oscillator 2 frequency can be maintained stable with a tolerance of
±10% over the full operating temperature and a voltage range V
For example:
An output frequency at the RC-oscillator 2 of 2 MHz can be obtained by connecting a
resistor R
OS1
1
1
x
ext
= 360 k (see Figure 23 on page 27).
Clock
Clock
Ext.
Ext.
or
OS0
1
1
0
OSC1
OSC2
oscillator 1
Control
RC
Ext. input clock
ExIn
Clock monitor
CCS
RcOut1
0
1
x
Stop
ExOut
Stop
Osc-Stop
Supervisor Reset Output (Res)
RcOut1
Osc-Stop
RcOut1
CCS
Res
DD
Disable
Disable
Enable
from 2.5 V to 6.0 V.
4551C–4BMCU–01/04
DD
. In this