ST52T430K3M6 STMicroelectronics, ST52T430K3M6 Datasheet - Page 47

• Manufacturer Part Number: ST52T430K3M6
• Manufacturer: STMicroelectronics

Specifications of ST52T430K3M6

• Cpu Family: ST52
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SCI/UART
• Program Memory Type: EPROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 256Byte
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5/5.8V
• Operating Supply Voltage (min): 2.7/3V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 34
• Package Type: SSO
• Lead Free Status / Rohs Status: Not Compliant

9.2 Register Description
The WDT timeout is defined by setting the value of
the REG_CONF 2. The first 4 bits of this register
are used, obtaining 16 different delays as
illustrated in Table 9.2. In Table 9.2 timeout is
expressed by using the number of WDT CLK. The
WDT CLK is derived from the clock master by a
division factor of 500. Timeout is obtained by
multiplying the WDT CLK pulse length for the
number of pulses defined by the configuration
register REG_CONF 2. Table 9.4 illustrates the
pulse lengths for typical values of the clock master.
Table 9.3 illustrates the timeout WDT values when
the Master Clock is 5 MHz.
Table 9.2 WDT REG_CONF 2
4-7
Bit
0
1
2
3
D(3:0)
Name
NC
Reset Configuration ‘0000’
Value
0000
0001
0010
0100
0101
1000
1001
1010
0011
0110
1011
1100
1101
0111
1110
1111
x
Timeout Values (WDT
Not Used
1250
1875
2500
3125
3750
4375
5000
5625
6250
6875
7500
8125
8750
9375
625
1
Table 9.3 Timeout Values with CLK = 5 MHz
Table 9.4 Typical WDT CLK Pulse Length
MASTER CLK
4-7
Bit
0
1
2
3
(MHz)
10
20
4
5
8
Reset Configuration ‘0000’
D (3:0)
Name
NC
Value
0000
0001
0010
0100
0101
1000
1001
1010
WDT CLK
0011
0110
1011
1100
1101
0111
1110
1111
x
(KHz)
10
16
20
40
8
Timeout Values (ms)
ST52T430/E430
Not Used
LENGTH (ms)
187.5
312.5
437.5
562.5
687.5
812.5
937.5
62.5
WDT CLK
125
250
375
500
625
750
875
0.1
PULSE
0.0625
0.125
0.025
0.05
0.1
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