ATMEGA169P-16MCH Atmel, ATMEGA169P-16MCH Datasheet - Page 19

• Manufacturer Part Number: ATMEGA169P-16MCH
• Description: MCU AVR 16KB FLASH 16MHZ 64-VQFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA169P-16MCH

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VQFN Exposed Pad, 64-HVQFN, 64-SQFN, 64-DHVQFN
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.8.1
8018P–AVR–08/10
The X-register, Y-register, and Z-register
The registers R26..R31 have some added functions to their general purpose usage. These reg-
isters are 16-bit address pointers for indirect addressing of the data space. The three indirect
address registers X, Y, and Z are defined as described in
Figure 6-5.
In the different addressing modes these address registers have functions as fixed displacement,
automatic increment, and automatic decrement (see the instruction set reference for details).
X-register
Y-register
Z-register
The X-, Y-, and Z-registers
15
7
R29 (0x1D)
15
7
R27 (0x1B)
15
7
R31 (0x1F)
YH
XH
ZH
0
0
0
Figure
7
R28 (0x1C)
7
R26 (0x1A)
7
R30 (0x1E)
6-5.
ATmega169P
YL
XL
ZL
0
19
0
0
0
0
0