Microchip Technology MA330031-2 Data Sheet
2011-2013 Microchip Technology Inc.
DS70000657H-page 205
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X AND PIC24EPXXXGP/MC20X
12.2
Timer1 Control Register
REGISTER 12-1:
T1CON: TIMER1 CONTROL REGISTER
R/W-0
U-0
R/W-0
U-0
U-0
U-0
U-0
U-0
TON
(
)
—
TSIDL
—
—
—
—
—
bit 15
bit 8
U-0
R/W-0
R/W-0
R/W-0
U-0
R/W-0
R/W-0
U-0
—
TGATE
TCKPS1
TCKPS0
—
TSYNC
(
)
TCS
(
)
—
bit 7
bit 0
Legend:
R = Readable bit
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
-n = Value at POR
‘1’ = Bit is set
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
TON:
Timer1 On bit
1
= Starts 16-bit Timer1
0
= Stops 16-bit Timer1
bit 14
Unimplemented:
Read as ‘0’
bit 13
TSIDL:
Timer1 Stop in Idle Mode bit
1
= Discontinues module operation when device enters Idle mode
0
= Continues module operation in Idle mode
bit 12-7
Unimplemented:
Read as ‘0’
bit 6
TGATE:
Timer1 Gated Time Accumulation Enable bit
When TCS = 1:
This bit is ignored.
When TCS = 0:
1
This bit is ignored.
When TCS = 0:
1
= Gated time accumulation is enabled
0
= Gated time accumulation is disabled
bit 5-4
TCKPS<1:0>:
Timer1 Input Clock Prescale Select bits
11
= 1:256
10
= 1:64
01
= 1:8
00
= 1:1
bit 3
Unimplemented:
Read as ‘0’
bit 2
TSYNC:
Timer1 External Clock Input Synchronization Select bit
When TCS = 1:
1
1
= Synchronizes external clock input
0
= Does not synchronize external clock input
When TCS = 0:
This bit is ignored.
This bit is ignored.
bit 1
TCS:
Timer1 Clock Source Select bit
(
)
1
= External clock is from pin, T1CK (on the rising edge)
0
= Internal clock (F
P
)
bit 0
Unimplemented:
Read as ‘0’
Note 1:
When Timer1 is enabled in External Synchronous Counter mode (TCS = 1, TSYNC = 1, TON = 1), any
attempts by user software to write to the TMR1 register are ignored.
attempts by user software to write to the TMR1 register are ignored.