ATTINY84V-10PU Atmel, ATTINY84V-10PU Datasheet - Page 60
ATTINY84V-10PU
Manufacturer Part Number
ATTINY84V-10PU
Description
AVR MCU, 8K FLASH, 512B RAM, 512B EE
Manufacturer
Atmel
Datasheet
1.ATTINY84V-10PU.pdf
(233 pages)
Specifications of ATTINY84V-10PU
Controller Family/series
AVR Tiny
No. Of I/o's
12
Eeprom Memory Size
512Byte
Ram Memory Size
1KB
Cpu Speed
10MHz
Core Size
8bit
Program Memory Size
8KB
Oscillator Type
External, Internal
Processor Series
ATTINY8x
Core
AVR8
Data Bus Width
8 bit
Program Memory Type
Flash
Data Ram Size
512 B
Interface Type
SPI
Maximum Clock Frequency
10 MHz
Number Of Programmable I/os
12
Number Of Timers
2
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
Package / Case
PDIP-14
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATTINY84V-10PU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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12.2.5
60
ATtiny24/44/84
Digital Input Enable and Sleep Modes
are read back again, but as previously discussed, a nop instruction is included to be able to read
back the value recently assigned to some of the pins.
Note:
As shown in
input of the schmitt-trigger. The signal denoted SLEEP in the figure, is set by the MCU Sleep
Controller in Power-down mode, Power-save mode, and Standby mode to avoid high power
consumption if some input signals are left floating, or have an analog signal level close to V
SLEEP is overridden for port pins enabled as external interrupt pins. If the external interrupt
request is not enabled, SLEEP is active also for these pins. SLEEP is also overridden by various
other alternate functions as described in
If a logic high level (“one”) is present on an asynchronous external interrupt pin configured as
“Interrupt on Rising Edge, Falling Edge, or Any Logic Change on Pin” while the external interrupt
is not enabled, the corresponding External Interrupt Flag will be set when resuming from the
above mentioned Sleep mode, as the clamping in these sleep mode produces the requested
logic change.
Assembly Code Example
C Code Example
unsigned char i;
...
; Define pull-ups and set outputs high
; Define directions for port pins
ldi
ldi
out
out
; Insert nop for synchronization
nop
; Read port pins
in
...
...
/* Define pull-ups and set outputs high */
/* Define directions for port pins */
PORTA = (1<<PA4)|(1<<PA1)|(1<<PA0);
DDRA = (1<<DDA3)|(1<<DDA2)|(1<<DDA1)|(1<<DDA0);
/* Insert nop for synchronization*/
_NOP();
/* Read port pins */
i = PINA;
...
1. For the assembly program, two temporary registers are used to minimize the time from pull-
ups are set on pins 0, 1 and 4, until the direction bits are correctly set, defining bit 2 and 3 as
low and redefining bits 0 and 1 as strong high drivers.
Figure 12-2 on page
r16,(1<<PA4)|(1<<PA1)|(1<<PA0)
r17,(1<<DDA3)|(1<<DDA2)|(1<<DDA1)|(1<<DDA0)
PORTA,r16
DDRA,r17
r16,PINA
(1)
57, the digital input signal can be clamped to ground at the
”Alternate Port Functions” on page
61.
8006F–AVR–02/07
CC
/2.
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