ST62E32BF1 STMicroelectronics, ST62E32BF1 Datasheet - Page 28

• Manufacturer Part Number: ST62E32BF1
• Description: 8-bit Microcontrollers - MCU UV EPROM 8K SPI/UART
• Manufacturer: STMicroelectronics

Specifications of ST62E32BF1

• Product Category: 8-bit Microcontrollers - MCU
• Core: ST6
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 8 MHz
• Program Memory Size: 7948 B
• Data Ram Size: 192 B
• On-chip Adc: Yes
• Package / Case: SDIP-42
• Mounting Style: Through Hole
• A/d Bit Size: 8 bit
• A/d Channels Available: 21
• Data Rom Size: 128 B
• Interface Type: SPI, UART
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Number Of Programmable I/os: 30
• Number Of Timers: 1 x 8 bit
• Program Memory Type: EPROM
• Factory Pack Quantity: 13
• Supply Voltage - Max: 5 V
• Supply Voltage - Min: 4.5 V

ST62T32B ST62E32B
DIGITAL WATCHDOG (Cont’d)
These instructions test the C bit and Reset the
MCU (i.e. disable the Watchdog) if the bit is set
(i.e. if the Watchdog is active), thus disabling the
Watchdog.
In all modes, a minimum of 28 instructions are ex-
ecuted after activation, before the Watchdog can
generate a Reset. Consequently, user software
should load the watchdog counter within the first
27 instructions following Watchdog activation
(software mode), or within the first 27 instructions
executed following a Reset (hardware activation).
It should be noted that when the GEN bit is low (in-
terrupts disabled), the NMI interrupt is active but
cannot cause a wake up from STOP/WAIT modes.
Figure 19. Digital Watchdog Block Diagram
I
28/83
S
RSFF
RESET
Q
R
DB0
DB1.7
8
WRITE
DATA BUS
-2
LOAD
7
RESET
SET
Figure 18. A typical circuit making use of the
EXERNAL STOP MODE CONTROL feature
SWITCH
SET
-2
8
OSCILLATOR
CLOCK
-12
VA00010
NMI
I/O
VR02002