AT90CAN64-16AUR Atmel, AT90CAN64-16AUR Datasheet - Page 13

• Manufacturer Part Number: AT90CAN64-16AUR
• Description: MCU AVR 64K FLASH 16MHZ 64TQFP
• Manufacturer: Atmel
• Series: AVR® 90CANr

Specifications of AT90CAN64-16AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: CAN, EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K 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-TQFP, 64-VQFP
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.5.2
7679H–CAN–08/08
Extended Z-pointer Register for ELPM/SPM – RAMPZ
Figure 3-3.
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).
• Bits 7..1 – Res: Reserved Bits
These bits are reserved for future use and will always read as zero. For compatibility with future
devices, be sure to write to write them to zero.
• Bit 0 – RAMPZ0: Extended RAM Page Z-pointer
The RAMPZ Register is normally used to select which 64K RAM Page is accessed by the Z-
pointer. As the AT90CAN32/64/128 does not support more than 64K of SRAM memory, this reg-
ister is used only to select which page in the program memory is accessed when the ELPM/SPM
instruction is used. The different settings of the RAMPZ0 bit have the following effects:
Figure 3-4.
Note:
RAMPZ0 = 0: Program memory address 0x0000 - 0x7FFF (lower 64K bytes) is accessed by
RAMPZ0 = 1: Program memory address 0x8000 - 0xFFFF (higher 64K bytes) is accessed by
Bit
Read/Write
Initial Value
X-register
Y-register
Z-register
Bit (Individually)
Bit (Z-pointer)
– AT90CAN32 and AT90CAN64: RAMPZ0 exists as register bit but it is not used for
– AT90CAN128: RAMPZ0 exists as register bit and it is used for program memory
program memory addressing.
addressing.
LPM (different of ELPM) is never affected by the RAMPZ setting.
ELPM/SPM
ELPM/SPM
The X-, Y-, and Z-registers
The Z-pointer used by ELPM and SPM
23
7
R
7
–
0
15
7
R27 (0x1B)
15
7
R29 (0x1D)
15
7
R31 (0x1F)
RAMPZ
R
6
–
0
5
–
R
0
XH
YH
ZH
0
16
0
R
4
–
0
15
7
R
3
–
0
0
0
ZH
7
R26 (0x1A)
7
R28 (0x1C)
7
R30 (0x1E)
R
2
–
0
AT90CAN32/64/128
R
0
8
1
–
0
XL
YL
ZL
7
7
RAMPZ0
0
R/W
0
0
ZL
RAMPZ
0
0
0
0
0
0
0
13