AT90PWM316-16SUR Atmel, AT90PWM316-16SUR Datasheet - Page 180
![MCU AVR 16K FLASH 16MHZ 32-SOIC](/photos/7/29/72992/313-32-soic_sml.jpg)
AT90PWM316-16SUR
Manufacturer Part Number
AT90PWM316-16SUR
Description
MCU AVR 16K FLASH 16MHZ 32-SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM216-16SU.pdf
(359 pages)
Specifications of AT90PWM316-16SUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
27
Program Memory Size
16KB (16K x 8)
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 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-SOIC (7.5mm Width)
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOICATAVRMC200 - KIT EVAL FOR AT90PWM3 ASYNCATAVRFBKIT - KIT DEMO BALLAST FOR AT90PWM2
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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17.2.2
17.2.3
180
AT90PWM216/316
Master Mode
MCU Control Register – MCUCR
means that it will not receive incoming data. Note that the SPI logic will be reset once the SS pin
is driven high.
The SS pin is useful for packet/byte synchronization to keep the slave bit counter synchronous
with the master clock generator. When the SS pin is driven high, the SPI slave will immediately
reset the send and receive logic, and drop any partially received data in the Shift Register.
When the SPI is configured as a Master (MSTR in SPCR is set), the user can determine the
direction of the SS pin.
If SS is configured as an output, the pin is a general output pin which does not affect the SPI
system. Typically, the pin will be driving the SS pin of the SPI Slave.
If SS is configured as an input, it must be held high to ensure Master SPI operation. If the SS pin
is driven low by peripheral circuitry when the SPI is configured as a Master with the SS pin
defined as an input, the SPI system interprets this as another master selecting the SPI as a
slave and starting to send data to it. To avoid bus contention, the SPI system takes the following
actions:
Thus, when interrupt-driven SPI transmission is used in Master mode, and there exists a possi-
bility that SS is driven low, the interrupt should always check that the MSTR bit is still set. If the
MSTR bit has been cleared by a slave select, it must be set by the user to re-enable SPI Master
mode.
• Bit 7– SPIPS: SPI Pin Redirection
Thanks to SPIPS (SPI Pin Select) in MCUCR Sfr, SPI pins can be redirected.
On 32 pins packages, SPIPS has the following action:
On 24 pins package, SPIPS has the following action:
Note that programming port are always located on alternate SPI port.
Bit
Read/Write
Initial Value
1. The MSTR bit in SPCR is cleared and the SPI system becomes a Slave. As a result of
2. The SPIF flag in SPSR is set, and if the SPI interrupt is enabled, and the I-bit in SREG
the SPI becoming a Slave, the MOSI and SCK pins become inputs.
is set, the interrupt routine will be executed.
– When the SPIPS bit is written to zero, the SPI signals are directed on pins
– When the SPIPS bit is written to one,the SPI signals are directed on alternate SPI
– When the SPIPS bit is written to zero, the SPI signals are directed on alternate SPI
– When the SPIPS bit is written to one,the SPI signals are directed on pins
MISO,MOSI, SCK and SS.
pins, MISO_A, MOSI_A, SCK_A and SS_A.
pins, MISO_A, MOSI_A, SCK_A and SS_A.
MISO,MOSI, SCK and SS.
SPIPS
R/W
7
0
R
6
–
0
R
5
–
0
PUD
R/W
4
0
R
3
–
0
R
2
–
0
IVSEL
R/W
1
0
IVCE
R/W
0
0
7710E–AVR–08/10
MCUCR
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