LM3S1621 Datasheet, PDF (851/947 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Stellaris^® LM3S1621 Microcontroller
Table 19-4. Signals by Function, Except for GPIO (continued)
Function
Pin Name Pin Number Pin Type Buffer Type^a
Description
U0Rx
26
I
TTL
UART module 0 receive. When in IrDA mode, this
signal has IrDA modulation.
U0Tx
27
O
TTL
UART module 0 transmit. When in IrDA mode, this
signal has IrDA modulation.
U1CTS
2
I
TTL
UART module 1 Clear To Send modem flow control
10
input signal.
34
U1DCD
1
I
TTL
UART module 1 Data Carrier Detect modem status
11
input signal.
35
U1DSR
47
I
TTL
UART module 1 Data Set Ready modem output
control line.
U1DTR
40
O
TTL
UART module 1 Data Terminal Ready modem
100
status input signal.
U1RI
37
I
TTL
UART module 1 Ring Indicator modem status input
41
signal.
97
UART
U1RTS
U1Rx
43
O
TTL
UART module 1 Request to Send modem flow
61
control output line.
10
I
TTL
UART module 1 receive. When in IrDA mode, this
12
signal has IrDA modulation.
23
26
66
92
U1Tx
11
O
TTL
UART module 1 transmit. When in IrDA mode, this
13
signal has IrDA modulation.
22
27
67
91
U2Rx
10
I
TTL
UART module 2 receive. When in IrDA mode, this
19
signal has IrDA modulation.
92
98
U2Tx
6
O
TTL
UART module 2 transmit. When in IrDA mode, this
11
signal has IrDA modulation.
18
99
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
Table 19-5. GPIO Pins and Alternate Functions
IO
Pin
Analog
Function
1
2
Digital Function (GPIOPCTL PMCx Bit Field Encoding)^a
3
4
5
6
7
8
9
10
11
PA0 26
-
U0Rx
-
-
-
-
-
- I2C1SCL U1Rx
-
-
PA1 27
-
U0Tx
-
-
-
-
-
- I2C1SDA U1Tx
-
-
PA2 28
- SSI0Clk -
-
-
-
-
-
-
-
-
-
PA3 29
- SSI0Fss -
-
-
-
-
-
-
-
-
-
PA4 30
- SSI0Rx -
-
-
-
-
-
-
-
-
-
PA5 31
- SSI0Tx -
-
-
-
-
-
-
-
-
-
January 21, 2012
851
Texas Instruments-Production Data