ATTINY10-MAHR Atmel, ATTINY10-MAHR Datasheet - Page 72
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ATTINY10-MAHR
Manufacturer Part Number
ATTINY10-MAHR
Description
MCU AVR 1024K FLASH 12MHZ 8UDFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY10-MAHR
Core Processor
AVR
Core Size
8-Bit
Speed
12MHz
Peripherals
POR, PWM, WDT
Number Of I /o
4
Program Memory Size
1KB (512 x 16)
Program Memory Type
FLASH
Ram Size
32 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Details
Other names
ATTINY10-MAH
ATTINY10-MAH
ATTINY10-MAH
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11.10 Accessing 16-bit Registers
72
ATtiny4/5/9/10
Figure 11-15. Timer/Counter Timing Diagram, with Prescaler (f
The TCNT0, OCR0A/B, and ICR0 are 16-bit registers that can be accessed by the AVR CPU via
the 8-bit data bus. The 16-bit register must be byte accessed using two read or write operations.
Each 16-bit timer has a single 8-bit register for temporary storing of the high byte of the 16-bit
access. The same temporary register is shared between all 16-bit registers within each 16-bit
timer. Accessing the low byte triggers the 16-bit read or write operation. When the low byte of a
16-bit register is written by the CPU, the high byte stored in the temporary register, and the low
byte written are both copied into the 16-bit register in the same clock cycle. When the low byte of
a 16-bit register is read by the CPU, the high byte of the 16-bit register is copied into the tempo-
rary register in the same clock cycle as the low byte is read.
Not all 16-bit accesses uses the temporary register for the high byte. Reading the OCR0A/B 16-
bit registers does not involve using the temporary register.
To do a 16-bit write, the high byte must be written before the low byte. For a 16-bit read, the low
byte must be read before the high byte.
The following code example shows how to access the 16-bit timer registers assuming that no
interrupts updates the temporary register. The same principle can be used directly for accessing
the OCR0A/B and ICR0 Registers.
and ICF n
(PC and PFC PWM)
TOVn
(CTC and FPWM)
(Update at TOP)
TCNTn
TCNTn
OCRnx
(clk
as TOP)
clk
clk
I/O
(FPWM)
I/O
Tn
/8)
(if used
TOP - 1
TOP - 1
Old OCRnx Value
TOP
TOP
clk_I/O
BOTTOM
TOP - 1
/8)
New OCRnx Value
BOTTOM + 1
TOP - 2
8127D–AVR–02/10
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