ST62T03CM3 STMicroelectronics, ST62T03CM3 Datasheet - Page 18

• Manufacturer Part Number: ST62T03CM3
• Description: IC MCU 8BIT W/ADC 16-SOP
• Manufacturer: STMicroelectronics
• Series: ST6r

Specifications of ST62T03CM3

• Core Processor: ST6
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LVD, POR, WDT
• Number Of I /o: 9
• Program Memory Size: 1KB (1K x 8)
• Program Memory Type: OTP
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -
• Other names: 497-8232; ST62T03CM3

ST6200C ST6201C ST6203C
5 CLOCKS, SUPPLY AND RESET
5.1 CLOCK SYSTEM
The main oscillator of the MCU can be driven by
any of these clock sources:
– external clock signal
– external AT-cut parallel-resonant crystal
– external ceramic resonator
– external RC network (R
In addition, an on-chip Low Frequency Auxiliary
Oscillator (LFAO) is available as a back-up clock
system or to reduce power consumption.
An optional Oscillator Safeguard (OSG) filters
spikes from the oscillator lines, and switches to the
LFAO backup oscillator in the event of main oscil-
lator failure. It also automatically limits the internal
clock frequency (f
to guarantee correct operation. These functions
are illustrated in
Figure 9. Clock Circuit Block Diagram
18/100
1
OSCILLATOR
MAIN
Figure
INT
) as a function of V
10, and
f
OSG ENABLE OPTION BIT (See OPTION BYTE SECTION)
OSC
NET
).
Figure
OSCILLATOR SAFEGUARD (OSG)
filtering
LFAO
OSG
DD
11.
, in order
Doc ID 4563 Rev 5
(ADCR REGISTER)
OSCOFF BIT
Table 5
figurations using an external crystal or ceramic
resonator, an external clock input, an external re-
sistor (R
the LFAO.
For more details on configuring the clock options,
refer to the Option Bytes section of this document.
The internal MCU clock frequency (f
by 12 to drive the Timer, the Watchdog timer and
the A/D converter, by 13 to drive the CPU core and
the SPI and by 1 or 3 to drive the ARTIMER, as
shown in
With an 8 MHz oscillator, the fastest CPU cycle is
therefore 1.625µs.
A CPU cycle is the smallest unit of time needed to
execute any operation (for instance, to increment
the Program Counter). An instruction may require
two, four, or five CPU cycles for execution.
* Depending on device. See device summary on page 1.
0
1
NET
*
illustrates various possible oscillator con-
Figure
), or the lowest cost solution using only
Oscillator
Divider
9.
f
INT
: 12
: 13
: 1
: 3
CORE
8-BIT TIMER
WATCHDOG
ADC
8-BIT ARTIMER
SPI
8-BIT ARTIMER
INT
) is divided
*