ST7MDT2-EPB2/US STMicroelectronics, ST7MDT2-EPB2/US Datasheet - Page 50
![no-image](/images/manufacturer_photos/0/6/637/stmicroelectronics_sml.jpg)
ST7MDT2-EPB2/US
Manufacturer Part Number
ST7MDT2-EPB2/US
Description
BOARD PROGRAMMING SGL POS ST7
Manufacturer
STMicroelectronics
Type
MCUr
Specifications of ST7MDT2-EPB2/US
Contents
Programmer Board
For Use With/related Products
ST72311, ST72124, ST72314, ST72334
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
- Current page: 50 of 153
- Download datasheet (3Mb)
ST72334J/N, ST72314J/N, ST72124J
WATCHDOG TIMER (Cont’d)
The application program must write in the CR reg-
ister at regular intervals during normal operation to
prevent an MCU reset. The value to be stored in
the CR register must be between FFh and C0h
(see
– The WDGA bit is set (watchdog enabled)
– The T6 bit is set to prevent generating an imme-
– The T[5:0] bits contain the number of increments
Table 11.Watchdog Timing (f
Notes: Following a reset, the watchdog is disa-
bled. Once activated it cannot be disabled, except
by a reset.
The T6 bit can be used to generate a software re-
set (the WDGA bit is set and the T6 bit is cleared).
If the watchdog is activated, the HALT instruction
will generate a Reset.
14.1.4 Hardware Watchdog Option
If Hardware Watchdog is selected by option byte,
the watchdog is always active and the WDGA bit in
the CR is not used.
Refer to the device-specific Option Byte descrip-
tion.
14.1.5 Low Power Modes
14.1.6 Interrupts
None.
50/153
Mode
WAIT
HALT
diate reset
which represents the time delay before the
watchdog produces a reset.
Max
Min
Table 11 .Watchdog Timing (fCPU = 8
Description
No effect on Watchdog.
Immediate reset generation as soon as
the HALT instruction is executed if the
Watchdog is activated (WDGA bit is
set).
CR Register
initial value
C0h
FFh
WDG timeout period
CPU
= 8 MHz)
98.304
1.536
(ms)
MHz)):
14.1.7 Register Description
CONTROL REGISTER (CR)
Read /Write
Reset Value: 0111 1111 (7Fh)
Bit 7 = WDGA Activation bit .
This bit is set by software and only cleared by
hardware after a reset. When WDGA = 1, the
watchdog can generate a reset.
0: Watchdog disabled
1: Watchdog enabled
Note: This bit is not used if the hardware watch-
dog option is enabled by option byte.
Bit 6:0 = T[6:0] 7-bit timer (MSB to LSB).
These bits contain the decremented value. A reset
is produced when it rolls over from 40h to 3Fh (T6
becomes cleared).
STATUS REGISTER (SR)
Read /Write
Reset Value*: 0000 0000 (00h)
Bit 0 = WDOGF Watchdog flag .
This bit is set by a watchdog reset and cleared by
software or a power on/off reset. This bit is useful
for distinguishing power/on off or external reset
and watchdog reset.
0: No Watchdog reset occurred
1: Watchdog reset occurred
* Only by software and power on/off reset
Note: This register is not used in versions without
LVD Reset.
WDGA
7
-
7
-
T6
-
T5
-
T4
-
T3
-
T2
-
T1
WDOGF
0
T0
0
Related parts for ST7MDT2-EPB2/US
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ST7MDT2-DVP2/US](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
KIT DEVELOPMENT ST7
Manufacturer:
STMicroelectronics
Datasheet:
![ST7MDT2-PB/TQ44](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
MCU, MPU & DSP Development Tools ST7 Developmnt Board
Manufacturer:
STMicroelectronics
![ST7MDT2-DV/TQ44](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
MCU, MPU & DSP Development Tools ST7 Developmnt Board
Manufacturer:
STMicroelectronics
![ST7MDT2-EMU2B](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
MCU, MPU & DSP Development Tools ST7 Emulator Board
Manufacturer:
STMicroelectronics
![ST7MDT2-DBE2B](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
MCU, MPU & DSP Development Tools ST7 Developmnt Board
Manufacturer:
STMicroelectronics
![HCF4040BF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
STMicroelectronics [RIPPLE-CARRY BINARY COUNTER/DIVIDERS]
Manufacturer:
STMicroelectronics
Datasheet:
![HCF4054BF](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
STMicroelectronics [LIQUID-CRYSTAL DISPLAY DRIVERS]
Manufacturer:
STMicroelectronics
Datasheet:
![STEVAL-MKI062V2](/photos/28/39/283999/steval-mki062v2_tmb.jpg)
Part Number:
Description:
BOARD EVAL FOR MEMS SENSORS
Manufacturer:
STMicroelectronics
Datasheet:
![BUT32V](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
NPN TRANSISTOR POWER MODULE
Manufacturer:
STMicroelectronics
Datasheet:
![STTA12006TV2](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
TURBOSWITCH ULTRA-FAST HIGH VOLTAGE DIODE
Manufacturer:
STMicroelectronics
Datasheet:
![E110NS20FD](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
Manufacturer:
STMicroelectronics
Datasheet:
![MDS50-800](/images/manufacturer_photos/0/6/637/stmicroelectronics_tmb.jpg)
Part Number:
Description:
DIODE / SCR MODULE
Manufacturer:
STMicroelectronics
Datasheet: