aduc7032 Analog Devices, Inc., aduc7032 Datasheet - Page 82

• Manufacturer Part Number: aduc7032
• Description: Microconverter Integrated, Precision Battery Sensor
• Manufacturer: Analog Devices, Inc.

TIMER2 - WAKE-UP TIMER
Timer2 is a 32-bit wake-up timer, count-down or count-up,
with a programmable prescalar. The pre-scalar is clocked
directly from 1 of 4 clock sources, namely, the Core Clock
(default selection), the Low Power 32.768kHz Oscillator,
External 32.768kHz Watch Crystal, or the Precision 32.768kHz
Oscillator. The selected clock source can be scaled by a factor of
1, 16, 256 or 32768. The wake-up timer will continue to run
when the core clock is disabled. This gives a minimum
resolution of 48.83ns when operating at CD zero, the core is
operating at 20.48MHz, and with a prescalar of 1. Capture of
the current timer value is enabled if the Timer2 interrupt is
enabled via IRQEN[4].
The counter can be formatted as plain 32-bit value or as
Hours:Minutes:Seconds:Hundreths.
Timer2 reloads the value from T2LD either when TIMER2
overflows, or immediately when T2CLRI is written.
Timer2 interface consists of four MMRS:
- T2LD and T2VAL are 32-bit registers and hold 32-bit
- T2CLRI is an 8-bit register. Writing any value to this register
- T2CON is the configuration MMR described in Table 36
Preliminary Technical Data
unsigned integers. T2VAL is read-only.
will clear the timer2 interrupt.
below.
32.768kHz OSCILLATOR
32.768kHz OSCILLATOR
EXTERNAL 32.768kHz
WATCH CRYSTAL
LOW POWER
PRECISION
CLOCK
CORE
Figure 32 : Timer 2 block diagram
Rev. PrD | Page 82 of 128
1, 16, 256, OR 32768
PRESCALER
Timer2 Load Registers:
Name :
Address :
Default Value :
Access :
Function :
bit value that is loaded into the counter.
Timer2 Clear Register :
Name :
Address :
Default Value :
Access :
Function :
(with any value) by user code to refresh(reload) Timer2.
Timer2 Value Register :
Name :
Address :
Default Value :
Access :
Function :
current value of Timer2
UP/DOWN COUNTER
32-BIT LOAD
TIMER2
VALUE
32-BIT
T2LD
0xFFFF0340
0x00000
Write Only
T2LD is a 32 bit register which holds the 32
T2CLRI
0xFFFF034C
0xFF
Write Only
This 32-bit, write-only MMR is written
T2VAL
0xFFFF0344
0xFFFFFFFF
Read Only
T2VAL is a 32-bit register which holds the
TIMER2 IRQ
ADuC7032