st10f272z2 STMicroelectronics, st10f272z2 Datasheet - Page 92

• Manufacturer Part Number: st10f272z2
• Description: 16-bit Mcu With 256 Kbyte Flash Memory And 20 Kbyte Ram
• Manufacturer: STMicroelectronics

System reset
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Figure 23. Synchronous long hardware RESET (EA = 1)
1. If during the reset condition (RSTIN low), RPD voltage drops below the threshold voltage (about 2.5 V for 5 V operation),
2. Minimum RSTIN low pulse duration shall also be longer than 500ns to guarantee the pulse is not masked by the
RSTIN
RSTOUT
RPD
RSTF
(After Filter)
P0[15:13]
P0[12:2]
P0[1:0]
FLARST
RST
Notes:
IBUS-CS
(Internal)
the asynchronous reset is then immediately entered. Even if RPD returns above the threshold,
the reset is defnitively taken as asynchronous.
internal filter (refer to Section 21.1).
≤ 500 ns
≥ 50 ns
≤4 TCL
200
2)
µ
≤12 TCL
not t.
A Discharge
not transparent
≤ 500 ns
≥ 50 ns
1024+8 TCL
1024+8 TCL
not transparent
transparent
At this time RSTF is sampled LOW
so it is definitely LONG reset
transparent
≤ 500 ns
≥ 50 ns
3..4 TCL
≤ 1 ms
1)
V
RPD
> 2.5 V Asynchronous Reset not entered
≤ 2 TCL
not t.
not t.
not t.
7 TCL
ST10F272Z2