ATTINY13V-10MMU Atmel, ATTINY13V-10MMU Datasheet - Page 40

• Manufacturer Part Number: ATTINY13V-10MMU
• Description: MCU AVR 1K ISP FLASH 1.8V 10-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY13V-10MMU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 1KB (512 x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 10-MLF®, 10-DFN
• Processor Series: ATTINY1x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 64 B
• Interface Type: SPI
• Maximum Clock Frequency: 10 MHz
• Number Of Programmable I/os: 6
• Number Of Timers: 1
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 4 Channel
• Package: 10MLF EP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 10 MHz
• Operating Supply Voltage: 2.5|3.3|5 V
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -
• Lead Free Status / Rohs Status: Details

40
ATtiny13
tion, the application software should always clear the Watchdog System Reset Flag (WDRF)
and the WDE control bit in the initialisation routine, even if the Watchdog is not in use.
The following code example shows one assembly and one C function for changing the time-out
value of the Watchdog Timer.
Note:
The Watchdog Timer should be reset before any change of the WDP bits, since a change in the
WDP bits can result in a time-out when switching to a shorter time-out period.
Assembly Code Example
C Code Example
WDT_Prescaler_Change:
void WDT_Prescaler_Change(void)
{
}
; Turn off global interrupt
cli
; Reset Watchdog Timer
wdr
; Start timed sequence
in
ori
out
; --
; Set new prescaler(time-out) value = 64K cycles (~0.5 s)
ldi
out
; --
; Turn on global interrupt
sei
ret
__disable_interrupt();
__watchdog_reset();
/* Start timed sequence */
WDTCR |= (1<<WDCE) | (1<<WDE);
/* Set new prescaler(time-out) value = 64K cycles (~0.5 s) */
WDTCR = (1<<WDE) | (1<<WDP2) | (1<<WDP0);
__enable_interrupt();
1. The example code assumes that the part specific header file is included.
r16, WDTCR
r16, (1<<WDCE) | (1<<WDE)
WDTCR, r16
Got four cycles to set the new values from here -
r16, (1<<WDE) | (1<<WDP2) | (1<<WDP0)
WDTCR, r16
Finished setting new values, used 2 cycles -
(1)
(1)
2535J–AVR–08/10