ATAM862P-TNQY3D Atmel, ATAM862P-TNQY3D Datasheet - Page 28

• Manufacturer Part Number: ATAM862P-TNQY3D
• Description: IC MCU FLASH 4K TX 315MHZ 24SSOP
• Manufacturer: Atmel

Specifications of ATAM862P-TNQY3D

• 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

19.2.2
19.2.3
28
ATAM862-3
External Input Clock
RC-oscillator 2 with External Trimming Resistor
Figure 19-2. 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 gener-
ates a hardware reset.
Figure 19-3. External Input Clock
Table 19-2.
The RC-oscillator 2 is a high resolution trimmable oscillator whereby the oscillator frequency can
be trimmed with an external resistor between OSC1 and V
lator 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
ext
= 360 kΩ (see
OS1
1
1
x
Supervisor Function Bits
Figure 19-4 on page
Clock
OS0
Clock
Ext.
Ext.
1
1
0
or
OSC1
OSC2
DD
from 2.5V to 6.0V.
oscillator 1
29).
Control
RC
Ext. input clock
CCS
ExIn
Clock monitor
RcOut1
0
1
x
Stop
ExOut
Stop
Osc-Stop
DD
RcOut1
Supervisor Reset Output (Res)
. In this configuration, the RC-oscil-
Osc-Stop
RcOut1
CCS
Res
Disable
Disable
Enable
4554F–4BMCU–07/07