ST10F276Z5 STMicroelectronics, ST10F276Z5 Datasheet - Page 114
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ST10F276Z5
Manufacturer Part Number
ST10F276Z5
Description
16-BIT MICROCONTROLLER WITH MAC UNIT, UP TO 832 KBYTES FLASH MEMORY AND UP TO 68 KBYTES RAM
Manufacturer
STMicroelectronics
Datasheet
1.ST10F276Z5.pdf
(239 pages)
Specifications of ST10F276Z5
Single Voltage Supply
5V ±10% (embedded regulator for 1.8 V core supply)
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System reset
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always with FFFFh, which leads to an illegal opcode and consequently a trap event is
generated.
Exit from synchronous reset state
The reset sequence is extended until RSTIN level becomes high. Besides, it is internally
prolonged by the FLASH initialization when EA=1 (internal memory selected). Then, the
code execution restarts. The system configuration is latched from Port0, and ALE, RD and
WR/WRL pins are driven to their inactive level. The device starts program execution from
memory location 00'0000h in code segment 0. This starting location will typically point to the
general initialization routine. Timing of synchronous reset sequence are summarized in
Figures 28 and 29 where a Short Reset event is shown, with particular highlighting on the
fact that it can degenerate into Long Reset: the two figures show the behavior when booting
from internal or external memory respectively.
a typical synchronous Long Reset, again when booting from internal or external memory.
Synchronous reset and RPD pin
Whenever the RSTIN pin is pulled low (by external hardware or as a consequence of a
Bidirectional reset), the RPD internal weak pull-down is activated. The external capacitance
(if any) on RPD pin is slowly discharged through the internal weak pull-down. If the voltage
level on RPD pin reaches the input low threshold (around 2.5 V), the reset event becomes
immediately asynchronous. In case of hardware reset (short or long) the situation goes
immediately to the one illustrated in
the input threshold: the asynchronous reset is completed coherently. To grant the normal
completion of a synchronous reset, the value of the capacitance shall be big enough to
maintain the voltage on RPD pin sufficient high along the duration of the internal reset
sequence.
For a Software or Watchdog reset events, an active synchronous reset is completed
regardless of the RPD status.
It is important to highlight that the signal that makes RPD status transparent under reset is
the internal RSTF (after the noise filter).
Figure
26. There is no effect if RPD comes again above
Figure 30
and
Figure 31
reports the timing of
ST10F276Z5
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