ATAM862P-TNSY4D Atmel, ATAM862P-TNSY4D Datasheet - Page 28

• Manufacturer Part Number: ATAM862P-TNSY4D
• Description: IC MCU FLASH 4K TX 433MHZ 24SSOP
• Manufacturer: Atmel

Specifications of ATAM862P-TNSY4D

• 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
28
ATAM862-4
External Input Clock
ter frequency tolerance is better than ±50% over the full temperature and voltage range. The
basic center frequency of the RC-oscillator 1 is f
default after power-on reset.
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.
OS1
1
1
x
Supervisor Function Control Bits
Clock
OS0
Clock
Ext.
Ext.
1
1
0
or
OSC1
OSC2
oscillator 1
Control
RC
Ext. input clock
ExIn
CCS
Clock monitor
RcOut1
0
1
x
Stop
O
≈ 3.8 MHz. The RC oscillator 1 is selected by
ExOut
Stop
Osc-Stop
RcOut1
Supervisor Reset Output (Res)
Osc-Stop
RcOut1
CCS
Res
Disable
Disable
Enable
4551G–4BMCU–07/07