ATTINY5-MAHR Atmel, ATTINY5-MAHR Datasheet - Page 45
![IC MCU AVR 512B FLASH 8UDFN](/photos/12/32/123206/8-udfn-8ma4_sml.jpg)
ATTINY5-MAHR
Manufacturer Part Number
ATTINY5-MAHR
Description
IC MCU AVR 512B FLASH 8UDFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY9-MAHR.pdf
(169 pages)
Specifications of ATTINY5-MAHR
Package / Case
8-UDFN Exposed Pad
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Speed
12MHz
Number Of I /o
4
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
32 x 8
Program Memory Size
512B (512 x 8)
Data Converters
A/D 4x8b
Oscillator Type
Internal
Peripherals
POR, PWM, WDT
Core Size
8-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Details
- Current page: 45 of 169
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10.2.5
10.2.6
8127D–AVR–02/10
Digital Input Enable and Sleep Modes
Unconnected Pins
When reading back a software assigned pin value, a nop instruction must be inserted as indi-
cated in
positive edge of the clock. In this case, the delay tpd through the synchronizer is one system
clock period.
Figure 10-5. Synchronization when Reading a Software Assigned Pin Value
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 and Standby modes 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.
If some pins are unused, it is recommended to ensure that these pins have a defined level. Even
though most of the digital inputs are disabled in the deep sleep modes as described above, float-
ing inputs should be avoided to reduce current consumption in all other modes where the digital
inputs are enabled (Reset, Active mode and Idle mode).
The simplest method to ensure a defined level of an unused pin, is to enable the internal pull-up.
In this case, the pull-up will be disabled during reset. If low power consumption during reset is
important, it is recommended to use an external pull-up or pulldown. Connecting unused pins
directly to V
accidentally configured as an output.
INSTRUCTIONS
SYSTEM CLK
SYNC LATCH
Figure 10-5 on page
CC
Figure 10-2 on page
or GND is not recommended, since this may cause excessive currents if the pin is
PINxn
r16
r17
out PORTx, r16
45. The out instruction sets the “SYNC LATCH” signal at the
42, the digital input signal can be clamped to ground at the
“Alternate Port Functions” on page
0x00
nop
t
pd
0xFF
CC
in r17, PINx
/2.
ATtiny4/5/9/10
46.
0xFF
45
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