ATmega32M1 Automotive Atmel Corporation, ATmega32M1 Automotive Datasheet - Page 164
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ATmega32M1 Automotive
Manufacturer Part Number
ATmega32M1 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATMEGA16M1_AUTOMOTIVE.pdf
(12 pages)
3.ATMEGA16M1_AUTOMOTIVE.pdf
(25 pages)
4.ATMEGA16M1_AUTOMOTIVE.pdf
(367 pages)
Specifications of ATmega32M1 Automotive
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
27
Ext Interrupts
27
Usb Speed
No
Usb Interface
No
Spi
1
Uart
1
Can
1
Lin
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
11
Adc Resolution (bits)
10
Adc Speed (ksps)
125
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
1
Dac Resolution (bits)
10
Temp. Sensor
Yes
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 150
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
14
Input Capture Channels
1
Pwm Channels
10
32khz Rtc
No
Calibrated Rc Oscillator
Yes
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #2
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #3
- ATMEGA16M1_AUTOMOTIVE PDF datasheet #4
- Current page: 164 of 367
- Download datasheet (7Mb)
15.2.4
164
Atmel ATmega16/32/64/M1/C1
SPI Control Register – SPCR
• Bit 7 – SPIE: SPI Interrupt Enable
This bit causes the SPI interrupt to be executed if SPIF bit in the SPSR Register is set and the
if the Global Interrupt Enable bit in SREG is set.
• Bit 6 – SPE: SPI Enable
When the SPE bit is written to one, the SPI is enabled. This bit must be set to enable any SPI
operations.
• Bit 5 – DORD: Data Order
When the DORD bit is written to one, the LSB of the data word is transmitted first.
When the DORD bit is written to zero, the MSB of the data word is transmitted first.
• Bit 4 – MSTR: Master/Slave Select
This bit selects Master SPI mode when written to one, and Slave SPI mode when written logic
zero. If SS is configured as an input and is driven low while MSTR is set, MSTR will be
cleared, and SPIF in SPSR will become set. The user will then have to set MSTR to re-enable
SPI Master mode.
• Bit 3 – CPOL: Clock Polarity
When this bit is written to one, SCK is high when idle. When CPOL is written to zero, SCK is
low when idle. Refer to
summarized below:
Table 15-2.
• Bit 2 – CPHA: Clock Phase
The settings of the Clock Phase bit (CPHA) determine if data is sampled on the leading (first)
or trailing (last) edge of SCK. Refer to
functionality is summarized below:
Table 15-3.
• Bits 1, 0 – SPR1, SPR0: SPI Clock Rate Select 1 and 0
Bit
Read/Write
Initial Value
CPOL
CPHA
0
1
0
1
CPOL Functionality
CPHA Functionality
SPIE
R/W
7
0
Figure 15-3
SPE
R/W
6
0
DORD
R/W
5
0
and
Figure 15-3
Leading Edge
Leading Edge
Figure 15-4
Sample
MSTR
Falling
Rising
R/W
Setup
4
0
and
CPOL
R/W
for an example. The CPOL functionality is
3
0
Figure 15-4
CPHA
R/W
2
0
for an example. The CPOL
SPR1
R/W
1
0
Trailing Edge
Trailing Edge
Sample
Falling
Rising
Setup
SPR0
R/W
0
0
7647G–AVR–09/11
SPCR
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