dsPIC30F Family Reference Manual
DS70059C-page 12-4 © 2004 Microchip Technology Inc.
12.2.2 Type B Timer
Timer2 and Timer4, if present, are Type B timers on most dsPIC30F devices. A Type B timer has
the following unique features over other types of timers:
• A Type B timer can be concatenated with a Type C timer to form a 32-bit timer. The TxCON
register for a Type B timer has the T32 control bits to enable the 32-bit timer function.
• The clock synchronization for a Type B timer is performed after the prescale logic.
A block diagram of the Type B timer is shown in Figure 12-2.
Figure 12-2: Type B Timer Block Diagram
TON
Sync
PRx
TxIF
Equal
Comparator x 16
TMRx
Reset
Event Flag
Q
Q
D
CK
TGATE
TCKPS<1:0>
Prescaler
1, 8, 64, 256
2
TGATE
T
CY
1
0
TCS
1 X
0 1
TGATE
0 0
Gate
TxCKI
Sync
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