Datasheet

 2009-2012 Microchip Technology Inc. DS70591E-page 217
dsPIC33FJ32GS406/606/608/610 and dsPIC33FJ64GS406/606/608/610
13.0 TIMER2/3/4/5 FEATURES
Timer2 and Timer4 are Type B timers that offer the
following major features:
• A Type B Timer can be Concatenated with a
Type C Timer to form a 32-Bit Timer
• External Clock Input (TxCK) is Always Synchronized
to the Internal Device Clock and the Clock
Synchronization is Performed after the Prescaler
Figure 13-1 shows a block diagram of the Type B timer.
Timer3 and Timer5 are Type C timers that offer the
following major features:
• A Type C Timer can be Concatenated with a
Type B Timer to form a 32-Bit Timer
• At Least One Type C Timer has the Ability to
Trigger an Analog-to-Digital Conversion
• External Clock Input (TxCK) is Always Synchronized
to the Internal Device Clock and the Clock
Synchronization is Performed before the Prescaler
A block diagram of the Type C timer is shown in
Figure 13-2.
FIGURE 13-1: TYPE B TIMER BLOCK DIAGRAM (x = 2, 4)
FIGURE 13-2: TYPE C TIMER BLOCK DIAGRAM (x = 3, 5)
Note 1: This data sheet summarizes the features
of the dsPIC33FJ32GS406/606/608/610
and dsPIC33FJ64GS406/606/608/610
families 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”
(DS70205) in the “dsPIC33F/PIC24H
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
Section 4.0 “Memory Organization” in
this data sheet for device-specific register
and bit information.
Note: Timer3 is not available on all devices.
Prescaler
(/n)
TGATE
TCS
00
10
x1
TMRx
Comparator
TGATE
Set TxIF Flag
0
1
Sync
TCKPS<1:0>
Equal
Reset
TxCK
FCY
Prescaler
(/n)
TCKPS<1:0>
Falling Edge
Detect
Gate
Sync
PRx
TGATE
TCS
00
10
x1
Comparator
FCY
TGATE
Set TxIF Flag
0
1
TCKPS<1:0>
Equal
Reset
TxCK
ADC SOC Trigger
Prescaler
(/n)
TCKPS<1:0>
Sync
Prescaler
(/n)
PRx
TMRx
Gate
Sync
Falling Edge
Detect