LM3S9L71_15 Datasheet, PDF (453/1283 Pages) Texas Instruments – Stellaris LM3S9L71 Microcontroller

Stellaris^® LM3S9L71 Microcontroller
Table 9-3. General-Purpose Timers Signals (108BGA) (continued)
Pin Name
Pin Number Pin Mux / Pin Pin Type Buffer Type^a Description
Assignment
CCP3
B2
PE4 (1)
I/O
M2
PC6 (1)
M1
PC5 (5)
M6
PA7 (7)
K3
PG4 (1)
H12
PF1 (10)
A11
PB2 (4)
B11
PE0 (3)
B5
PD4 (2)
TTL
Capture/Compare/PWM 3.
CCP4
L2
PC7 (1)
I/O
L1
PC4 (6)
M6
PA7 (2)
K4
PF7 (1)
K11
PJ4 (10)
A4
PE2 (1)
C6
PD5 (2)
TTL
Capture/Compare/PWM 4.
CCP5
B3
PE5 (1)
I/O
H2
PD2 (4)
L1
PC4 (1)
C10
PG7 (8)
M7
PG5 (1)
A7
PB6 (6)
B7
PB5 (2)
TTL
Capture/Compare/PWM 5.
CCP6
G1
PD0 (6)
I/O
H2
PD2 (2)
M10
PJ3 (10)
A12
PE1 (5)
C9
PH0 (1)
B7
PB5 (3)
TTL
Capture/Compare/PWM 6.
CCP7
G2
PD1 (6)
I/O
H1
PD3 (2)
C8
PH1 (1)
A7
PB6 (2)
B4
PE3 (5)
TTL
Capture/Compare/PWM 7.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
9.3 Functional Description
The main components of each GPTM block are two free-running up/down counters (referred to as
Timer A and Timer B), two match registers, two prescaler match registers, two shadow registers,
and two load/initialization registers and their associated control functions. The exact functionality of
each GPTM is controlled by software and configured through the register interface. Timer A and
Timer B can be used individually, in which case they have a 16-bit counting range. In addition, Timer
A and Timer B can be concatenated to provide a 32-bit counting range. Note that the prescaler can
only be used when the timers are used individually.
The available modes for each GPTM block are shown in Table 9-4 on page 454. Note that when
counting down in one-shot or periodic modes, the prescaler acts as a true prescaler and contains
the least-significant bits of the count. When counting up in one-shot or periodic modes, the prescaler
acts as a timer extension and holds the most-significant bits of the count. In input edge count mode,
the prescaler always acts as a timer extension, regardless of the count direction.
July 03, 2014
453
Texas Instruments-Production Data