ST92T141K4M6 STMicroelectronics, ST92T141K4M6 Datasheet - Page 164

• Manufacturer Part Number: ST92T141K4M6
• Description: Microcontrollers (MCU) OTP EPROM 16K SPI
• Manufacturer: STMicroelectronics

Specifications of ST92T141K4M6

• Data Bus Width: 8 bit, 16 bit
• Program Memory Type: EPROM
• Program Memory Size: 16 KB
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 15
• Number Of Timers: 2
• Operating Supply Voltage: 4.5 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SO-34
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 6 Channel
• Lead Free Status / Rohs Status: No

ST92141 - ELECTRICAL CHARACTERISTICS
WATCHDOG TIMING TABLE
(V
unless otherwise specified)
Note: The value in the left hand column shows the formula used to calculate the timing minimum or maximum from the oscillator clock period,
watchdog prescaler and counter programmed values.
The value in the right hand two columns show the timing minimum and maximum for an internal clock (INTCLK) at 25MHz, with minimum and
maximum prescaler value and minimum and maximum counter value.
Measurement points are taken with reference to V
(1) Formula guaranteed by design.
Legend:
Tck = INTCLK period = OSCIN period when OSCIN is not divided by 2;
Psc = Watchdog Prescaler Register content (WDTPR): from 0 to 255
Cnt = Watchdog Counter Registers content (WDTRH,WDTRL): from 0 to 65535
T
WATCHDOG TIMING
164/179
N°
WDIN
1
2
3
4
DD
1
= Watchdog Input signal period (WDIN)
= 5V
TwWDOL
TwWDOH
TwWDIL
TwWDIH
Symbol
10%, T
2 x OSCIN period when OSCIN is divided by 2;
OSCIN period x PLL factor when the PLL is enabled.
WDOUT Low Pulse Width
WDOUT High Pulse Width
WDIN High Pulse Width
WDIN Low Pulse Width
A
=
–
40°C to +85°C, C
Parameter
IH
-V
IH
/ V
Load
OH
-V
= 50pF, f
OH
for positive pulse and V
4 x (Psc+1) x (Cnt+1) x Tck
4 x (Psc+1) x (Cnt+1) x Tck
(Psc+1) x (Cnt+1) x T
(Psc+1) x (Cnt+1) x T
with T
with T
INTCLK
Formula
4 x Tck + 10
4 x Tck +10
WDIN
WDIN
= 25MHz, Push-pull output configuration,
8 x Tck
8 x Tck
(1)
Value (Note)
IL
-V
WDIN
WDIN
IL
/ V
OL
-V
OL
for negative pulse
Min
160
320
160
320
170
170
Max
2.69
2.69
Unit
ns
ns
ns
ns
ns
ns
s
s