DSPIC30F6011A MICROCHIP [Microchip Technology], DSPIC30F6011A Datasheet - Page 72
DSPIC30F6011A
Manufacturer Part Number
DSPIC30F6011A
Description
High-Performance Digital Signal Controllers
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.DSPIC30F6011A.pdf
(238 pages)
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dsPIC30F6011A/6012A/6013A/6014A
FIGURE 9-1:
9.1
The 16-bit timer can be placed in the Gated Time
Accumulation mode. This mode allows the internal T
to increment the respective timer when the gate input
signal (T1CK pin) is asserted high. Control bit TGATE
(T1CON<6>) must be set to enable this mode. The
timer must be enabled (TON = 1) and the timer clock
source set to internal (TCS = 0).
When the CPU goes into the Idle mode, the timer will
stop incrementing unless TSIDL = 0. If TSIDL = 1, the
timer will resume the incrementing sequence upon
termination of the CPU Idle mode.
9.2
The input clock (F
Timer has a prescale option of 1:1, 1:8, 1:64 and 1:256,
selected by control bits TCKPS<1:0> (T1CON<5:4>).
The prescaler counter is cleared when any of the
following occurs:
• a write to the TMR1 register
• a write to the T1CON register
• device Reset, such as POR and BOR
However, if the timer is disabled (TON = 0), then the
timer prescaler cannot be reset since the prescaler
clock is halted.
TMR1 is not cleared when T1CON is written. It is
cleared by writing to the TMR1 register.
DS70143B-page 70
Timer Gate Operation
Timer Prescaler
SOSCO/
T1IF
Event Flag
SOSCI
T1CK
OSC
TGATE
/4 or external clock) to the 16-bit
16-BIT TIMER1 MODULE BLOCK DIAGRAM
0
1
Reset
Equal
LPOSCEN
Comparator x 16
TMR1
PR1
Preliminary
Q
Q
CY
Gate
Sync
CK
T
CY
D
9.3
During CPU Sleep mode, the timer will operate if:
• The timer module is enabled (TON = 1) and
• The timer clock source is selected as external
• The TSYNC bit (T1CON<2>) is asserted to a logic
When all three conditions are true, the timer will con-
tinue to count up to the Period register and be reset to
0x0000.
When a match between the timer and the Period regis-
ter occurs, an interrupt can be generated if the
respective timer interrupt enable bit is asserted.
TGATE
(TCS = 1) and
‘0’ which defines the external clock source as
asynchronous.
Timer Operation During Sleep
Mode
1 x
0 1
0 0
TON
TSYNC
1
0
© 2005 Microchip Technology Inc.
TCKPS<1:0>
1, 8, 64, 256
Prescaler
Sync
2
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