ATAM893T-TKS Atmel, ATAM893T-TKS Datasheet - Page 17
ATAM893T-TKS
Manufacturer Part Number
ATAM893T-TKS
Description
IC MON TIRE-PRESS ATARX9X SER
Manufacturer
Atmel
Series
MARC4r
Datasheet
1.ATAM893T-TKS.pdf
(98 pages)
Specifications of ATAM893T-TKS
Core Processor
MARC4
Core Size
4-Bit
Speed
4MHz
Connectivity
SSI (2-Wire, 3 Wire)
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
4KB (4K x 8)
Program Memory Type
EEPROM
Eeprom Size
64 x 16
Ram Size
256 x 4
Voltage - Supply (vcc/vdd)
1.8 V ~ 6.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
20-SOIC (5.3mm Width), 20-SO, 20-SOEIAJ
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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4.5.2
4.5.2.1
4.5.2.2
4680C–4BMCU–01/05
Oscillator Circuits and External Clock Input Stage
RC-oscillator 1 Fully Integrated
External Input Clock
The ATAM893-D 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.
Figure 4-13. RC-oscillator 1
The OSC1 or OSC2 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 hard-
ware reset.
Figure 4-14. External Input Clock
Clock
Clock
Ext.
Ext.
or
OSC1
OSC2
RC-oscillator 1
Control
Ext. input clock
ExIn
Clock monitor
RcOut1
Stop
O
ExOut
Stop
4.0 MHz. The RC oscillator 1 is selected by
Osc-Stop
RcOut1
Osc-Stop
RcOut1
CCS
Res
ATAM893-D
17
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