CP3BT23_14 Datasheet, PDF (266/324 Pages) Texas Instruments – CP3BT23 Reprogrammable Connectivity Processor with Bluetooth and Dual CAN Interfaces

CP3BT23
SNOSCX3A – JULY 2013 – REVISED JANUARY 2014
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26.2.1 Mode Control Register (MODE)
The MODE register is a word-wide read/write register which controls the mode selection of all four timer
subsystems. The register is clear after reset.
7
6
TMOD2
5
T4RUN
4
T3RUN
3
2
TMOD1
1
T2RUN
0
T1RUN
15
14
TMOD4
13
T8RUN
12
T7RUN
11
10
TMOD3
9
T6RUN
8
T5RUN
TxRUN
TMODx
The Timer Run bit controls whether the corresponding timer is stopped or running. If set, the
associated counter and clock prescaler is started depending on the mode of operation. Once
set, the clock to the clock prescaler and the counter are enabled and the counter will
increment each time the clock prescaler counter value matches the value defined in the
associated clock prescaler field (CxPRSC).
0 – Timer stopped.
1 – Timer running.
The Timer System Operating Mode field enables or disables the Timer Subsystem and
defines its operating mode.
00 – Low-Power Mode. All clocks to the counter subsystem are stopped. The counter is
stopped regardless of the value of the TxRUN bits. Read operations to the Timer Subsystem
will return the last value; software must not perform any write operations to the Timer
Subsystem while it is disabled since those will be ignored.
01 – Dual 8-bit PWM mode. Each 8-bit counter may individually be started or stopped via its
associated TxRUN bit. The TIOx pins will function as PWM outputs.
10 – 16-bit PWM mode. The two 8-bit counters are concatenated to form a single 16-bit
counter. The counter may be started or stopped with the lower of the two TxRUN bits, i.e.
T1RUN, T3RUN, T5RUN, and T7RUN. The TIOx pins will function as PWM outputs.
11 – Capture Mode. Both 8-bit counters are concatenated and operate as a single 16-bit
counter. The counter may be started or stopped with the lower of the two TxRUN bits, i.e.,
T1RUN, T3RUN, T5RUN, and T7RUN. The TIOx pins will function as capture inputs.
26.2.2 I/O Control Register 1 (IO1CTL)
The I/O Control Register 1 (IO1CTL) is a word-wide read/ write register. The register controls the function
of the I/O pins TIO1 through TIO4 depending on the selected mode of operation. The register is clear after
reset.
7
6
4
3
2
0
P2POL
C2EDG
P1POL
C1EDG
15
P4POL
CxEDG
14
12
11
10
8
C4EDG
P3POL
C3EDG
The Capture Edge Control field specifies the polarity of a capture event and the reset of the
counter. The value of this three bit field has no effect while operating in PWM mode.
266 Versatile Timer Unit (VTU)
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