AT90PWM1-16MU Atmel, AT90PWM1-16MU Datasheet - Page 25

• Manufacturer Part Number: AT90PWM1-16MU
• Description: IC AVR PWM 8KB FLASH 16MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® 90PWM Lightingr

Specifications of AT90PWM1-16MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 19
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 32-QFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.4
6.5
6.5.1
6.5.2
6.5.3
6.5.4
4378C–AVR–09/08
I/O Memory
General Purpose I/O Registers
General Purpose I/O Register 0 – GPIOR0
General Purpose I/O Register 1 – GPIOR1
General Purpose I/O Register 2 – GPIOR2
General Purpose I/O Register 3– GPIOR3
The I/O space definition of the AT90PWM1 is shown in
All AT90PWM1 I/Os and peripherals are placed in the I/O space. All I/O locations may be
accessed by the LD/LDS/LDD and ST/STS/STD instructions, transferring data between the 32
general purpose working registers and the I/O space. I/O registers within the address range
0x00 - 0x1F are directly bit-accessible using the SBI and CBI instructions. In these registers, the
value of single bits can be checked by using the SBIS and SBIC instructions. Refer to the
instruction set section for more details. When using the I/O specific commands IN and OUT, the
I/O addresses 0x00 - 0x3F must be used. When addressing I/O registers as data space using
LD and ST instructions, 0x20 must be added to these addresses. The AT90PWM1 is a complex
microcontroller with more peripheral units than can be supported within the 64 location reserved
in Opcode for the IN and OUT instructions. For the Extended I/O space from 0x60 - 0xFF in
SRAM, only the ST/STS/STD and LD/LDS/LDD instructions can be used.
For compatibility with future devices, reserved bits should be written to zero if accessed.
Reserved I/O memory addresses should never be written.
Some of the status flags are cleared by writing a logical one to them. Note that, unlike most other
AVR’s, the CBI and SBI instructions will only operate on the specified bit, and can therefore be
used on registers containing such status flags. The CBI and SBI instructions work with registers
0x00 to 0x1F only.
The I/O and peripherals control registers are explained in later sections.
The AT90PWM1 contains four General Purpose I/O Registers. These registers can be used for
storing any information, and they are particularly useful for storing global variables and status
flags.
The General Purpose I/O Registers, within the address range 0x00 - 0x1F, are directly bit-
accessible using the SBI, CBI, SBIS, and SBIC instructions.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
GPIOR07 GPIOR06 GPIOR05 GPIOR04 GPIOR03 GPIOR02 GPIOR01 GPIOR00
GPIOR17 GPIOR16 GPIOR15 GPIOR14 GPIOR13 GPIOR12 GPIOR11 GPIOR10
GPIOR27 GPIOR26 GPIOR25 GPIOR24 GPIOR23 GPIOR22 GPIOR21 GPIOR20
R/W
R/W
R/W
7
0
7
0
7
0
7
R/W
R/W
R/W
6
0
6
0
6
0
6
R/W
R/W
R/W
5
0
5
0
5
0
5
R/W
R/W
R/W
4
0
4
0
4
0
4
R/W
R/W
R/W
3
0
3
0
3
0
3
“Register Summary” on page
R/W
R/W
R/W
2
0
2
0
2
0
2
R/W
R/W
R/W
1
0
1
0
1
0
1
R/W
R/W
R/W
0
0
0
0
0
0
0
AT90PWM1
GPIOR0
GPIOR1
GPIOR2
277.
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