ST62T65CM6 STMicroelectronics, ST62T65CM6 Datasheet - Page 27

IC MCU 8BIT OTP/EPROM 28 PSOIC

ST62T65CM6

Manufacturer Part Number
ST62T65CM6
Description
IC MCU 8BIT OTP/EPROM 28 PSOIC
Manufacturer
STMicroelectronics
Series
ST6r
Datasheet

Specifications of ST62T65CM6

Core Processor
ST6
Core Size
8-Bit
Speed
8MHz
Connectivity
SPI
Peripherals
LED, LVD, POR, WDT
Number Of I /o
21
Program Memory Size
3.8KB (3.8K x 8)
Program Memory Type
OTP
Eeprom Size
128 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 6 V
Data Converters
A/D 13x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Controller Family/series
ST6
No. Of I/o's
21
Eeprom Memory Size
128Byte
Ram Memory Size
128Byte
Cpu Speed
8MHz
No. Of Timers
2
Rohs Compliant
Yes
Processor Series
ST62T6x
Core
ST6
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SCI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
21
Number Of Timers
1
Operating Supply Voltage
3 V to 6 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Development Tools By Supplier
ST62GP-EMU2, ST62E2XC-EPB/110, ST62E6XC-EPB/US, STREALIZER-II
Minimum Operating Temperature
- 40 C
On-chip Adc
8 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
497-2103-5

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DIGITAL WATCHDOG (Cont’d)
The Watchdog is associated with a Data space
register (Digital WatchDog Register, DWDR, loca-
tion 0D8h) which is described in greater detail in
Section 3.2.1 Digital Watchdog Register
This register is set to 0FEh on Reset: bit C is
cleared to “0”, which disables the Watchdog; the
timer downcounter bits, T0 to T5, and the SR bit
are all set to “1”, thus selecting the longest Watch-
dog timer period. This time period can be set to the
user’s requirements by setting the appropriate val-
ue for bits T0 to T5 in the DWDR register. The SR
bit must be set to “1”, since it is this bit which gen-
erates the Reset signal when it changes to “0”;
clearing this bit would generate an immediate Re-
set.
It should be noted that the order of the bits in the
DWDR register is inverted with respect to the as-
sociated bits in the down counter: bit 7 of the
DWDR register corresponds, in fact, to T0 and bit
2 to T5. The user should bear in mind the fact that
these bits are inverted and shifted with respect to
the physical counter bits when writing to this regis-
ter. The relationship between the DWDR register
bits and the physical implementation of the Watch-
dog timer downcounter is illustrated in
Only the 6 most significant bits may be used to de-
fine the time period, since it is bit 6 which triggers
the Reset when it changes to “0”. This offers the
user a choice of 64 timed periods ranging from
3,072 to 196,608 clock cycles (with an oscillator
frequency of 8MHz, this is equivalent to timer peri-
ods ranging from 384µs to 24.576ms).
Figure
(DWDR).
17.
Figure 17. Watchdog Counter Control
D0
D1
D2
D3
D4
D5
D6
D7
ST6255C ST6265C ST6265B
2
8
SR
T5
T4
T3
T2
T1
T0
C
OSC 12
RESET
VR02068A
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