ADuC7060
TIMER3
Timer3 Value Register
Timer3 is a general-purpose, 16-bit, count up/count down
timer with a programmable prescaler. Timer3 can be clocked
from the core clock or the low power 32.768 kHz oscillator with
a prescaler of 1, 16, 256, or 32,768.
Timer3 has a capture register (T3CAP) that can be triggered by
a selected IRQ source initial assertion. Once triggered, the
current timer value is copied to T3CAP, and the timer continues
running. This feature can be used to determine the assertion of
an event with increased accuracy.
Name:
Address:
Default value:
Access:
Function:
T3VAL
0xFFFF0384
0xFFFF
Read only
T3VAL is a 16-bit register that holds the
current value of Timer3.
The Timer3 interface consists of five MMRs.
Time3 Capture Register
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T3LD, T3VAL, and T3CAP are 16-bit registers and hold
16-bit unsigned integers. T3VAL and T3CAP are read only.
T3CLRI is an 8-bit register. Writing any value to this
register clears the interrupt.
T3CON is the configuration MMR described in Table 80.
Name:
Address:
Default value:
Access:
T3CAP
0xFFFF0390
0x0000
Read only
Timer3 Load Registers
Function:
This is a 16-bit register that holds the 32-bit
Name:
Address:
T3LD
0xFFFF0380
value captured by an enabled IRQ event.
Timer3 Control Register
Default value:
Access:
Function:
0x0000
Read and write
T3LD 16-bit register holds the 16-bit value
Name:
Address:
Default value:
T3CON
0xFFFF0388
0x00000000
that is loaded into the counter.
Timer3 Clear Register
Access:
Function:
Read and write
This 32-bit MMR configures the mode of
Name:
Address:
Access:
Function:
T3CLRI
0xFFFF038C
Write only
This 8-bit, write-only MMR is written (with
any value) by user code to clear the
interrupt.
Rev. 0 | Page 68 of 100
operation of Timer3.
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