EVAL-ADUC7032QSPZ Analog Devices Inc, EVAL-ADUC7032QSPZ Datasheet - Page 73

• Manufacturer Part Number: EVAL-ADUC7032QSPZ
• Description: EVAL DEV QUICK START ADUC7032
• Manufacturer: Analog Devices Inc
• Series: QuickStart™ PLUS Kitr
• Type: MCUr

Specifications of EVAL-ADUC7032QSPZ

• Contents: Evaluation Board, Power Supply, Cable, Software, Emulator and Documentation
• For Use With/related Products: ADuC7032
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TIMER2—WAKE-UP TIMER
Timer2 is a 32-bit wake-up timer, count-down or count-up,
with a programmable prescalar. The prescalar is clocked directly
from one of four clock sources, namely, the core clock (default
selection), the low power 32.768 kHz oscillator, the external
32.768 kHz watch crystal, or the precision 32.768 kHz oscillator.
The selected clock source can be scaled by a factor of 1, 16, 256,
or 32,768. The wake-up timer continues to run when the core
clock is disabled. This gives a minimum resolution of 48.83 ns
when operating at CD zero; the core is operating at 20.48 MHz,
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.
The Timer2 interface consists of four MMRs.
•
•
•
T2LD and T2VAL: 32-bit registers that hold 32-bit
unsigned integers. T2VAL is read only.
T2CLRI: 8-bit register. Writing any value to this register
clears the Timer2 interrupt.
T2CON: configuration MMR described in Table 56.
32.768kHz OSCILLATOR
32.768kHz OSCILLATOR
EXTERNAL 32.768kHz
WATCH CRYSTAL
LOW POWER
PRECISION
CLOCK
CORE
Figure 32. Timer2 Block Diagram
1, 16, 256, OR 32768
Rev.0 | Page 73 of 116
PRESCALAR
Timer2 Load Register
Name: T2LD
Address: 0xFFFF0340
Default Value: 0x00000000
Access: Read/write
Function: This 32-bit register holds the 32-bit value loaded into
the counter.
Timer2 Clear Register
Name: T2CLRI
Address: 0xFFFF034C
Access: Write only
Function: This 8-bit, write-only MMR is written (with any
value) by user code to clear the interrupt.
Timer2 Value Register
Name: T2VAL
Address: 0xFFFF0344
Default Value: 0xFFFFFFFF
Access: Read only
Function: This 32-bit register holds the current value of Timer2.
UP/DOWN COUNTER
32-BIT LOAD
TIMER2
VALUE
32-BIT
TIMER2 IRQ
ADuC7032-8L