STEVAL-IFS012V1 STMicroelectronics, STEVAL-IFS012V1 Datasheet - Page 27

• Manufacturer Part Number: STEVAL-IFS012V1
• Description: BOARD ST72651AR6/STTS75/STLM20
• Manufacturer: STMicroelectronics

Specifications of STEVAL-IFS012V1

• Sensor Type: Temperature
• Sensing Range: Depends on IC
• Interface: I²C, USB
• Sensitivity: Depends on IC
• Voltage - Supply: 5V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ST72F651AR6, STTS75, STLM20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8419

6.2 RESET SEQUENCE MANAGER (RSM)
6.2.1 Introduction
The reset sequence manager includes three RE-
SET sources as shown in
■
■
■
These sources act on the RESET pin and it is al-
ways kept low during the delay phase.
The RESET service routine vector is fixed at ad-
dresses FFFEh-FFFFh in the ST7 memory map.
Figure 17. RESET Sequences
External RESET source pulse
Internal LVD RESET (Low Voltage Detection)
Internal WATCHDOG RESET
WATCHDOG
RESET
EXTERNAL
RESET
SOURCE
RESET PIN
V
V
IT+(LVD)
IT-(LVD)
RUN
V
DD
ACTIVE PHASE
Figure
RESET
LVD
6.2.2:
t
t
w(RSTL)out
h(RSTL)in
RUN
Doc ID 7215 Rev 4
ACTIVE
PHASE
SHORT EXT.
RESET
DELAY
The basic RESET sequence consists of 3 phases
as shown in
■
■
■
Caution: When the ST7 is unprogrammed or fully
erased, the Flash is blank and the RESET vector
is not programmed. For this reason, it is recom-
mended to keep the RESET pin in low state until
programming mode is entered, in order to avoid
unwanted behaviour.
t
Active Phase depending on the RESET source
Min 512 CPU clock cycle delay (see
and
RESET vector fetch
h(RSTL)in
t
w(RSTL)out
RUN
Figure 20
WATCHDOG UNDERFLOW
Figure
ACTIVE
PHASE
LONG EXT.
RESET
17:
INTERNAL RESET (min 512 T
VECTOR FETCH
RUN
ACTIVE
PHASE
WATCHDOG
ST72651AR6
RESET
t
w(RSTL)out
Figure 19
RUN
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CPU
)
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