IC MCU 8BIT OTP/EPROM 28 PSOIC

ST62T65CM6

Manufacturer Part NumberST62T65CM6
DescriptionIC MCU 8BIT OTP/EPROM 28 PSOIC
ManufacturerSTMicroelectronics
SeriesST6
ST62T65CM6 datasheet
 


Specifications of ST62T65CM6

Core ProcessorST6Core Size8-Bit
Speed8MHzConnectivitySPI
PeripheralsLED, LVD, POR, WDTNumber Of I /o21
Program Memory Size3.8KB (3.8K x 8)Program Memory TypeOTP
Eeprom Size128 x 8Ram Size128 x 8
Voltage - Supply (vcc/vdd)3 V ~ 6 VData ConvertersA/D 13x8b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case28-SOIC (7.5mm Width)Controller Family/seriesST6
No. Of I/o's21Eeprom Memory Size128Byte
Ram Memory Size128ByteCpu Speed8MHz
No. Of Timers2Rohs CompliantYes
Processor SeriesST62T6xCoreST6
Data Bus Width8 bitData Ram Size128 B
Interface TypeSCIMaximum Clock Frequency8 MHz
Number Of Programmable I/os21Number Of Timers1
Operating Supply Voltage3 V to 6 VMaximum Operating Temperature+ 125 C
Mounting StyleSMD/SMTDevelopment Tools By SupplierST62GP-EMU2, ST62E2XC-EPB/110, ST62E6XC-EPB/US, STREALIZER-II
Minimum Operating Temperature- 40 COn-chip Adc8 bit
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names497-2103-5
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Page 17/84

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3 CLOCKS, RESET, INTERRUPTS AND POWER SAVING MODES
3.1 CLOCK SYSTEM
The MCU features a Main Oscillator which can be
driven by an external clock, or used in conjunction
with an AT-cut parallel resonant crystal or a suita-
ble ceramic resonator, or with an external resistor
(R
). In addition, a Low Frequency Auxiliary Os-
NET
cillator (LFAO) can be switched in for security rea-
sons, to reduce power consumption, or to offer the
benefits of a back-up clock system.
The Oscillator Safeguard (OSG) option filters
spikes from the oscillator lines, provides access to
the LFAO to provide a backup oscillator in the
event of main oscillator failure and also automati-
cally limits the internal clock frequency (f
function of V
, in order to guarantee correct oper-
DD
ation. These functions are illustrated in
Figure
10,
Figure 11
and
Figure
A programmable divider on F
INT
order to adjust the internal clock of the MCU to the
best power consumption and performance trade-
off.
Figure 8
illustrates various possible oscillator con-
figurations using an external crystal or ceramic res-
onator, an external clock input, an external resistor
(R
), or the lowest cost solution using only the
NET
LFAO. C
an C
should have a capacitance in the
L1
L2
range 12 to 22 pF for an oscillator frequency in the
4-8 MHz range.
The internal MCU clock frequency (f
by 12 to drive the Timer, the A/D converter and the
Watchdog timer, and by 13 to drive the CPU core,
as may be seen in
Figure
11.
With an 8MHz oscillator frequency, the fastest ma-
chine cycle is therefore 1.625µs.
A machine 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 machine cycles for execution.
3.1.1 Main Oscillator
The oscillator configuration may be specified by se-
lecting the appropriate option. When the CRYSTAL/
RESONATOR option is selected, it must be used with
a quartz crystal, a ceramic resonator or an external
signal provided on the OSCin pin. When the RC NET-
WORK option is selected, the system clock is gen-
erated by an external resistor.
The main oscillator can be turned off (when the
OSG ENABLED option is selected) by setting the
OSCOFF bit of the ADC Control Register. The
Low Frequency Auxiliary Oscillator is automatical-
ly started.
Figure 8. Oscillator Configurations
) as a
INT
Figure
9,
12.
is also provided in
) is divided
INT
ST6255C ST6265C ST6265B
CRYSTAL/RESONATOR CLOCK
CRYSTAL/RESONATOR option
ST6xxx
OSC
OSC
in
out
C
C
L1n
L2
EXTERNAL CLOCK
CRYSTAL/RESONATOR option
ST6xxx
OSC
OSC
in
out
NC
RC NETWORK
RC NETWORK option
ST6xxx
OSC
OSC
in
out
NC
R
NET
INTEGRATED CLOCK
CRYSTAL/RESONATOR option
OSG ENABLED option
ST6xxx
OSC
OSC
in
out
NC
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