TINY88-15MZ Atmel, TINY88-15MZ Datasheet - Page 125
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
TINY88-15MZ
Manufacturer Part Number
TINY88-15MZ
Description
MCU AVR 8KB FLASH 12MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.TINY88-15MZ.pdf
(246 pages)
Specifications of TINY88-15MZ
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
28
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
64 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 ~ 125°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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14.5
14.5.1
9157B–AVR–01/10
Register Description
SPCR – SPI Control Register
Data bits are shifted out and latched in on opposite edges of the SCK signal, ensuring sufficient
time for data signals to stabilize. This is clearly seen by summarizing
and
Table 14-2.
• 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 Mas-
ter 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
marized below:
Table 14-3.
Bit
Read/Write
Initial Value
CPOL
Table 14-4 on page
0
0
1
1
CPOL
Setting SPI Mode using Control Bits CPOL and CPHA
CPOL Functionality
0
1
SPIE
R/W
7
0
CPHA
Figure 14-3
0
1
0
1
126, as done in
SPE
R/W
6
0
and
SPI Mode
DORD
R/W
5
0
Figure 14-4
0
1
2
3
Leading Edge
Table 14-2
MSTR
Falling
Rising
R/W
4
0
for an example. The CPOL functionality is sum-
Sample (Falling)
Sample (Rising)
Leading Edge
Setup (Falling)
CPOL
Setup (Rising)
below.
R/W
3
0
ATtiny88 Automotive
CPHA
R/W
2
0
SPR1
R/W
Table 14-3 on page 125
1
0
Trailing Edge
Falling
Rising
Sample (Falling)
Sample (Rising)
Setup (Falling)
Setup (Rising)
Trailing eDge
SPR0
R/W
0
0
SPCR
125
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