Datasheet

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SLAS491A − AUGUST 2005 − REVISED OCTOBER 2005
34
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
Timer_A
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
TA
Timer_A clock frequency
Internal: SMCLK, ACLK;
External: TACLK, INCLK;
2.2 V 10
MHz
f
TA
Timer_A clock frequency
External: TACLK, INCLK;
Duty Cycle = 50% ±10%
3 V 16
MHz
t
TA,cap
Timer_A, capture timing TA0, TA1 2.2 V/3 V 20 ns
USI, Universal Serial Interface (MSP430x20x2, MSP430x20x3 only)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
USI
USI clock frequency
External: SCLK;
Duty Cycle = 50% ±10%;
2.2 V 10
MHz
f
USI
USI clock frequency
Duty Cycle = 50%
±
10%;
SPI Slave Mode
3 V 16
MHz
V
OL,I2C
Low-level output voltage on SDA
and SCL
USI module in I2C mode
I
(OLmax)
= 1.5 mA
2.2 V/3 V V
SS
V
SS
+0.4 V
typical characteristics − USI low-level output voltage on SDA and SCL (MSP430x20x2, MSP430x20x3 only)
Figure 14. USI Low-Level Output Voltage vs.
Output Current
V
OL
− Low-Level Output Voltage − V
0.0
1.0
2.0
3.0
4.0
5.0
0.0 0.2 0.4 0.6 0.8 1.0
V
CC
= 2.2 V
T
A
= 25°C
OL
I − Low-Level Output Current − mA
T
A
= 85°C
Figure 15. USI Low-Level Output Voltage vs.
Output Current
V
OL
− Low-Level Output Voltage − V
0.0
1.0
2.0
3.0
4.0
5.0
0.0 0.2 0.4 0.6 0.8 1.0
V
CC
= 3 V
T
A
= 25°C
OL
I − Low-Level Output Current − mA
T
A
= 85°C