CC2430
Peripherals : 16-bit timer, Timer1
13.6.11 Timer 1 Registers
This section describes the Timer 1 registers
which consist of the following registers:
• T1CCxL– Timer 1 Channel x
Capture/Compare Value Low
• T1CNTH– Timer 1 Count High
• T1CNTL– Timer 1 Count Low
• T1CTL– Timer 1 Control and Status
• T1CCTLx– Timer 1 Channel x
Capture/Compare Control
The TIMIF.OVFIM register bit resides in the
TIMIF register, which is described together
with Timer 3 and Timer 4 registers on page
118.
• T1CCxH– Timer 1 Channel x
Capture/Compare Value High
T1CNTH (0xE3) – Timer 1 Counter High
Bit
Name
Reset
R/W
Description
7:0
0x00
R
Timer count high order byte. Contains the high byte of the 16-bit
timer counter buffered at the time T1CNTL is read.
CNT[15:8]
T1CNTL (0xE2) – Timer 1 Counter Low
Bit
Name
Reset
R/W
Description
7:0
0x00
R/W
Timer count low order byte. Contains the low byte of the 16-bit
timer counter. Writing anything to this register results in the
counter being cleared to 0x0000.
CNT[7:0]
T1CTL (0xE4) – Timer 1 Control and Status
Bit
Name
Reset
R/W
Description
7
0
R/W0
Timer 1 channel 2 interrupt flag. Set when the channel 2 interrupt
condition occurs. Writing a 1 has no effect.
CH2IF
6
5
4
0
0
0
R/W0
R/W0
R/W0
Timer 1 channel 1 interrupt flag. Set when the channel 1 interrupt
condition occurs. Writing a 1 has no effect.
CH1IF
CH0IF
OVFIF
Timer 1 channel 0 interrupt flag. Set when the channel 0 interrupt
condition occurs. Writing a 1 has no effect.
Timer 1 counter overflow interrupt flag. Set when the counter
reaches the terminal count value in free-running or modulo mode,
and when zero is reached counting down in up-down mode.
Writing a 1 has no effect.
3:2
00
R/W
Prescaler divider value. Generates the active clock edge used to
update the counter as follows:
DIV[1:0]
00
01
10
11
Tick frequency/1
Tick frequency/8
Tick frequency/32
Tick frequency/128
1:0
00
R/W
Timer 1 mode select. The timer operating mode is selected as
follows:
MODE[1:0]
00
01
10
Operation is suspended
Free-running, repeatedly count from 0x0000 to 0xFFFF
Modulo, repeatedly count from 0x0000 to T1CC0
11
Up/down, repeatedly count from 0x0000 to T1CC0and
from T1CC0down to 0x0000
CC2430 Data Sheet (rev. 2.1) SWRS036F
Page 106 of 211
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
