aduc7062 Analog Devices, Inc., aduc7062 Datasheet - Page 63

• Manufacturer Part Number: aduc7062
• Description: Low-power, Precision Analog Microcontroller, Dual ?-? Adcs, Flash/ee, Arm7tdmi
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
Bit
5 to 4
3 to 0
TIMER1 OR WAKE-UP TIMER
Timer1 is a 32-bit wake-up timer, count down or count up, with
a programmable prescaler. The prescaler is clocked directly from
one of four clock sources, namely, the core clock (which is the
default selection), the low power 32.768 kHz oscillators, 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 97.66 ns
when operating at CD zero, the core is operating at 10.24 MHz,
and with a prescaler of 1 (ignoring the external GPIOs).
The counter can be formatted as a plain 32-bit value or as
hours:minutes:seconds:hundredths.
Timer1 reloads the value from T1LD either when Timer1
overflows or immediately when T1CLRI is written.
The Timer1 interface consists of four MMRS.
T1LD and T1VAL are 32-bit registers and hold 32-bit unsigned
integers. T1VAL is read only.
T1CLRI is an 8-bit register. Writing any value to this register
clears the Timer1 interrupt.
T1CON is the configuration MMR described in Table 75.
Name
T0FORMAT
T0SCALE
Description
Format.
00 = binary (default).
01 = reserved.
10 = hours:minutes:seconds:hundredths (23 hours to 0 hours).
11 = hours:minutes:seconds:hundredths (255 hours to 0 hours).
Prescaler.
0000 = source clock/1 (default).
0100 = source clock/16.
1000 = source clock/256.
1111 = source clock/32,768.
Note, 10XX = undefined
Rev. PrA | Page 63 of 100
Timer1 Load Registers
Name:
Address:
Default value:
Access:
Function:
Timer1 Clear Register
Name:
Address:
Access:
Function:
Timer1 Value Register
Name:
Address:
Default value:
Access:
Function:
ADuC7060/ADuC7061/ADuC7062
T1LD
0xFFFF0340
0x00000000
Read/write
T1LD is a 32-bit register that holds the 32-bit
value that is loaded into the counter.
T1CLRI
0xFFFF034C
Write only
This 32-bit, write only MMR is written (with
any value) by user code to clear the interrupt.
T1VAL
0xFFFF0344
0xFFFFFFFF
Read only
T1VAL is a 32-bit register that holds the
current value of Timer1.