AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 13

• Manufacturer Part Number: AT90CAN32 Automotive
• Manufacturer: Atmel Corporation

Specifications of AT90CAN32 Automotive

• Flash (kbytes): 32 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

3.5.2
7682C–AUTO–04/08
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
R
5
–
0
XH
YH
ZH
0
16 15
0
R
4
–
0
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