LM3S808 Datasheet, PDF (392/416 Pages) List of Unclassifed Manufacturers – Microcontroller

Electrical Characteristics
19.2.9
Table 19-14. GPIO Characteristics
Parameter Parameter Name
Condition
Min Nom Max Unit
t_GPIOR GPIO Rise Time (from 20% to 80% of V_DD)
2-mA drive
4-mA drive
- 17 26 ns
9 13 ns
8-mA drive
6 9 ns
8-mA drive with slew rate control
10 12 ns
t_GPIOF GPIO Fall Time (from 80% to 20% of V_DD)
2-mA drive
4-mA drive
- 17 25 ns
8 12 ns
8-mA drive
6 10 ns
8-mA drive with slew rate control
11 13 ns
Reset
Table 19-15. Reset Characteristics
Parameter No. Parameter Parameter Name
Min Nom Max Unit
R1
V_TH Reset threshold
- 2.0 - V
R2
V_BTH Brown-Out threshold
2.85 2.9 2.95 V
R3
T_POR Power-On Reset timeout
- 10 - ms
R4
T_BOR Brown-Out timeout
- 500 - µs
R5
T_IRPOR Internal reset timeout after POR
R6
T_IRBOR Internal reset timeout after BOR^a
15 - 30 ms
2.5 - 20 µs
R7
T_IRHWR Internal reset timeout after hardware reset (RST pin)
15 - 30 ms
R8
T_IRSWR Internal reset timeout after software-initiated system reset ^a 2.5 - 20 µs
R9
T_IRWDR Internal reset timeout after watchdog reset^a
2.5 - 20 µs
R10
T_IRLDOR Internal reset timeout after LDO reset^a
2.5 - 20 µs
R11
T_VDDRISE Supply voltage (V_DD) rise time (0 V-3.3 V)
- - 100 ms
a. 20 * t _{MOSC_per}
Figure 19-9. External Reset Timing (RST)
RST
R7
/Reset
(Internal)
392
October 01, 2007
Preliminary