LM3S3768 Luminary Micro, Inc, LM3S3768 Datasheet - Page 703

• Manufacturer Part Number: LM3S3768
• Description: Lm3s3768 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

24.2.9
24.2.10
June 02, 2008
General-Purpose I/O
Note:
Table 24-18. GPIO Characteristics
Reset
Table 24-19. Reset Characteristics
a. 20 * t
Figure 24-9. External Reset Timing (RST)
Parameter
Parameter No.
R
R
(Internal)
t
t
GPIOR
GPIOPU
GPIOPD
GPIOF
/Reset
RST
R10
R11
R1
R2
R3
R4
R5
R6
R7
R8
R9
MOSC_per
All GPIOs are 5 V-tolerant.
Parameter Name
GPIO Rise Time (from 20% to 80% of V
GPIO Fall Time (from 80% to 20% of V
GPIO internal pull-up resistor
GPIO internal pull-down resistor
Parameter
T
T
T
T
T
T
VDDRISE
T
T
V
IRHWR
IRSWR
IRWDR
T
IRPOR
IRBOR
V
POR
BOR
BTH
MIN
TH
Parameter Name
Reset threshold
Brown-Out threshold
Power-On Reset timeout
Brown-Out timeout
Internal reset timeout after POR
Internal reset timeout after BOR
Internal reset timeout after hardware reset (RST pin)
Internal reset timeout after software-initiated system reset
Internal reset timeout after watchdog reset
Supply voltage (V
Minimum RST pulse width
R11
R7
Preliminary
DD
) rise time (0V-3.3V)
DD
DD
)
)
Condition
8-mA drive with slew rate control
8-mA drive with slew rate control
a
Pull-down enabled
Pull-up enabled
2-mA drive
4-mA drive
8-mA drive
2-mA drive
4-mA drive
8-mA drive
a
a
2.85
Min
2.5
2.5
LM3S3768 Microcontroller
Min
6
0
0
2
-
-
-
-
50
55
-
-
Nom
500
Nom
2.0
2.9
10
17
10
17
11
-
-
-
-
-
-
-
9
6
8
6
-
-
Max
2.95
250
Max
20
20
11
110
180
1
1
26
13
12
25
12
10
13
-
-
-
-
9
Unit
ms
ms
ms
ms
Unit
µs
µs
µs
µs
µs
V
V
kΩ
kΩ
ns
ns
ns
ns
ns
ns
ns
ns
703