ATAM862P-TNQY8D Atmel, ATAM862P-TNQY8D Datasheet - Page 27

• Manufacturer Part Number: ATAM862P-TNQY8D
• Description: IC MCU FLASH 4K TX 868MHZ 24SSOP
• Manufacturer: Atmel

Specifications of ATAM862P-TNQY8D

• 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
19.2.1
4590G–4BMCU–06/07
Oscillator Circuits and External Clock Input Stage
RC-oscillator 1 Fully Integrated
software. A synchronization stage avoids too short clock periods if the clock source or the clock
speed is changed.
If an external input clock is selected, a supervisor circuit monitors the external input and gener-
ates a hardware reset if the external clock source fails or drops below 500 kHz for more than 1
ms.
Figure 19-1. Clock Module
Table 19-1.
The clock module generates two output clocks. One is the system clock (SYSCL) and the other
the periphery (SUBCL). The SYSCL can supply the core and the peripherals and the SUBCL
can supply only the peripherals with clocks. The modes for clock sources are programmable
with the OS1 bit and OS0 bit in the SC register and the CCS bit in the CM register.
The microcontroller block series consists of four different internal oscillators: two RC-oscillators,
one 4-MHz crystal oscillator, one 32-kHz crystal oscillator and one external clock input stage.
For timing insensitive applications, it is possible to use the fully integrated RC oscillator 1. It
operates without any external components and saves additional costs. The RC-oscillator 1 cen-
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.
Mode
1
2
3
4
OSC1
OSC2
OS1
1
0
1
0
*
*
*
Configurable
Clock Modes
Oscou
Osci
n
t
OS0
1
1
0
0
Ext. clock
RC oscillator2
4-MHz oscillator
32-kHz oscillator
R
Oscou
Oscou
Osci
Osci
ExI
n
Trim
n
n
t
t
SC:
BOT
RC-oscillator 1 (internal)
RC-oscillator 1 (internal)
RC-oscillator 1 (internal)
RC-oscillator 1 (internal)
RCOut2
ExOu
32Out
- - -
4Out
Stop
Stop
Stop
t
CCS = 1
OS1
Clock Source for SYSCL
OS0
Stop
Osc-
Stop
oscillator 1
RC
CM:
RCOut1
Control
NSTOP
O
IN1
IN2
Sleep
WDL
3.8 MHz. The RC oscillator 1 is selected by
CCS
external trimming resistor
Cin
CSS1
External input clock
RC-oscillator 2 with
32-kHz oscillator
4-MHz oscillator
/2
CSS0
CCS = 0
/2
Divide
r
/2
ATAM862-8
Cin/16
/2
kHz
32
Clock Source for
SYSCL
SUBCL
SUBCL
32 kHz
C
C
C
in
in
in
/16
/16
/16
27