Microchip Technology MA330025-1 Data Sheet

 2009-2012 Microchip Technology Inc.

DS70616G-page 275

The Timer2/3, Timer4/5, Timer6/7 and Timer8/9
modules are 32-bit timers, which can also be
configured as four independent 16-bit timers with
selectable operating modes. 
As a 32-bit timer, Timer2/3, Timer4/5, Timer6/7 and
Timer8/9 operate in three modes:
• Two Independent 16-Bit Timers (e.g., Timer2 and 

Timer3) with all 16-Bit Operating modes (except 
Asynchronous Counter mode)

• Single 32-Bit Timer
• Single 32-Bit Synchronous Counter
They also support these features:
• Timer Gate Operation
• Selectable Prescaler Settings
• Timer Operation during Idle and Sleep modes
• Interrupt on a 32-Bit Period Register Match
• Time Base for Input Capture and Output Compare 

Modules (Timer2 and Timer3 only)

• ADC1 Event Trigger (Timer2/3 only)
• ADC2 Event Trigger (Timer4/5 only)

Individually, all eight of the 16-bit timers can function as
synchronous timers or counters. They also offer the
features listed above, except for the event trigger; this
is implemented only with Timer2/3. The operating
modes and enabled features are determined by setting
the appropriate bit(s) in the T2CON, T3CON, T4CON,
T5CON, T6CON, T7CON, T8CON and T9CON
registers. T2CON, T4CON, T6CON and T8CON are
shown in generic form in 

. T3CON,

T5CON, T7CON and T9CON are shown in

For 32-bit timer/counter operation, Timer2, Timer4,
Timer6 or Timer8 is the least significant word; Timer3,
Timer5, Timer7 or Timer9 is the most significant word
of the 32-bit timers.

A block diagram for an example 32-bit timer pair is
shown 

Note 1: This data sheet summarizes

the

features of the

dsPIC33EPXXX(GP/MC/MU)806/810/814
and PIC24EPXXX(GP/GU)810/814 family
of devices. It is not intended to be a
comprehensive reference source. To
complement the information in this data
sheet, refer to Section 11. “Timers”
(DS70362) of the “dsPIC33E/PIC24E
Family Reference Manual”, which is
available from the Microchip web site
(

www.microchip.com

).

2: Some registers and associated bits

described in this section may not be
available on all devices. Refer to

 in

this data sheet for device-specific register
and bit information.

For 32-bit operation, T3CON, T5CON,
T7CON and T9CON control bits are
ignored. Only T2CON, T4CON, T6CON
and T8CON control bits are used for setup
and control. Timer2, Timer4, Timer6 and
Timer8 clock and gate inputs are utilized
for the 32-bit timer modules, but an
interrupt is generated with the Timer3,
Timer5, Ttimer7 and Timer9 interrupt
flags.

Only Timer2, 3, 4 and 5 can trigger a DMA
data transfer.