ATA6616-P3QW Atmel, ATA6616-P3QW Datasheet - Page 185

• Manufacturer Part Number: ATA6616-P3QW
• Description: TXRX MULTICHIP MOD LIN SIP 38QFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6616-P3QW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 16
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 38-VQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.15.5.5
9132D–AUTO–12/10
USIPP – USI Pin Position
Table 4-46.
• Bit 1 – USICLK: Clock Strobe
Writing a one to this bit location strobes the USI Data Register to shift one step and the coun-
ter to increment by one, provided that the USICS1..0 bits are set to zero and by doing so the
software clock strobe option is selected. The output will change immediately when the clock
strobe is executed, i.e., in the same instruction cycle. The value shifted into the USI Data Reg-
ister is sampled the previous instruction cycle. The bit will be read as zero.
When an external clock source is selected (USICS1 = 1), the USICLK function is changed
from a clock strobe to a Clock Select Register. Setting the USICLK bit in this case will select
the USITC strobe bit as clock source for the 4-bit counter (see
• Bit 0 – USITC: Toggle Clock Port Pin
Writing a one to this bit location toggles the USCK/SCL value either from 0 to 1, or from 1 to 0.
The toggling is independent of the setting in the Data Direction Register, but if the PORT value
is to be shown on the pin the DDB2 must be set as output (to one). This feature allows easy
clock generation when implementing master devices. The bit will be read as zero.
When an external clock source is selected (USICS1 = 1) and the USICLK bit is set to one,
writing to the USITC strobe bit will directly clock the 4-bit counter. This allows an early detec-
tion of when the transfer is done when operating as a master device.
• Bits 7:1 – Res: Reserved Bits
These bits are reserved bits in the Atmel
• Bit 0 – USIPOS: USI Pin Position
Setting or clearing this bit changes the USI pin position.
Bit
Read/Write
Initial Value
USICS1
0
0
0
1
1
1
1
USICS0
Relations between the USICS1..0 and USICLK Setting
0
0
1
0
1
0
1
R
7
0
-
USICLK
R
X
6
0
0
1
0
0
1
1
-
USI Data Register Clock
Source
No Clock
Software clock strobe
(USICLK)
Timer/Counter0 Compare
Match
External, positive edge
External, negative edge
External, positive edge
External, negative edge
R
5
0
-
®
ATtiny87/167 and always reads as zero.
R
4
0
-
Atmel ATA6616/ATA6617
R
3
0
-
R
2
0
-
Table
4-bit Counter Clock Source
No Clock
Software clock strobe
(USICLK)
Timer/Counter0 Compare
Match
External, both edges
External, both edges
Software clock strobe (USITC)
Software clock strobe (USITC)
4-46).
R
1
0
-
USIPOS
R/W
0
0
USIPP
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