LM3S1538 Luminary Micro, Inc, LM3S1538 Datasheet - Page 207

• Manufacturer Part Number: LM3S1538
• Description: Lm3s1538 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

10.2
July 26, 2008
Figure 10-1. GPTM Module Block Diagram
Table 10-1. Available CCP Pins
Functional Description
The main components of each GPTM block are two free-running 16-bit up/down counters (referred
to as TimerA and TimerB), two 16-bit match registers, two prescaler match registers, and two 16-bit
load/initialization registers and their associated control functions. The exact functionality of each
GPTM is controlled by software and configured through the register interface.
Software configures the GPTM using the GPTM Configuration (GPTMCFG) register (see page 218),
the GPTM TimerA Mode (GPTMTAMR) register (see page 219), and the GPTM TimerB Mode
(GPTMTBMR) register (see page 221). When in one of the 32-bit modes, the timer can only act as
a 32-bit timer. However, when configured in 16-bit mode, the GPTM can have its two 16-bit timers
configured in any combination of the 16-bit modes.
Timer
Timer 0
Timer 1
Timer 2
Timer 3
Interrupt
TimerA
Interrupt
TimerB
System
Clock
16-Bit Up/Down Counter
TimerA
TimerB
TimerA
TimerB
TimerA
TimerB
TimerA
TimerB
Interrupt / Config
GPTMCFG
GPTMCTL
GPTMIMR
GPTMRIS
GPTMMIS
GPTMICR
GPTMTAMATCHR
GPTMTBMATCHR
TimerA Control
TimerB Control
Even CCP Pin
CCP0
-
CCP2
-
CCP4
-
CCP6
-
GPTMTAPMR
GPTMTBPMR
GPTMTAILR
GPTMTAMR
GPTMTBILR
GPTMTBMR
GPTMTAPR
GPTMTBPR
Preliminary
Odd CCP Pin
-
CCP1
-
CCP3
-
CCP5
-
CCP7
TA Comparator
TB Comparator
GPTMTBR
0x0000 (Down Counter Modes)
0x0000 (Down Counter Modes)
GPTMAR
En
En
LM3S1538 Microcontroller
Clock / Edge
Clock / Edge
RTC Divider
Detect
Detect
32 KHz or
Even CCP Pin
Odd CCP Pin
207