ATA6612-EK Atmel, ATA6612-EK Datasheet - Page 221

• Manufacturer Part Number: ATA6612-EK
• Description: BOARD DEMO LIN-MCM FOR ATA6612
• Manufacturer: Atmel

Specifications of ATA6612-EK

• Main Purpose: Interface, LIN + MCU
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6612
• Primary Attributes: LIN-SBC (System-Basis-Chip) Transceiver, LIN 2.0, Voltage Regulator, Window Watchdog
• Secondary Attributes: 8 kB Flash, 4 Power Modes: Pre-Normal, Normal, Sleep, Silent, 48-QFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

6.18.3
9111H–AUTO–01/11
SPI Data Modes and Timing
Table 6-83.
Note:
There are four combinations of XCKn (SCK) phase and polarity with respect to serial data,
which are determined by control bits UCPHAn and UCPOLn. The data transfer timing dia-
grams are shown in
opposite edges of the XCKn signal, ensuring sufficient time for data signals to stabilize. The
UCPOLn and UCPHAn functionality is summarized in
ting of any of these bits will corrupt all ongoing communication for both the Receiver and
Transmitter.
Table 6-84.
Figure 6-76. UCPHAn and UCPOLn Data Transfer Timing Diagrams
Operating Mode
Synchronous Master
mode
UCPOLn
BAUD
f
UBRRn
OSC
0
0
1
1
Data setup (TXD)
Data sample (RXD)
Data setup (TXD)
1. The baud rate is defined to be the transfer rate in bit per second (bps)
XCK
XCK
Data sample (RXD)
Equations for Calculating Baud Rate Register Setting
UCPOLn and UCPHAn Functionality-
UCPHAn
Figure 6-76 on page
Baud rate (in bits per second, bps)
System Oscillator clock frequency
Contents of the UBRRnH and UBRRnL Registers, (0-4095)
0
1
0
1
UCPOL=0
Equation for Calculating Baud
BAUD
SPI Mode
=
0
1
2
3
Rate
-------------------------------------- -
2 UBRRn
(1)
221. Data bits are shifted out and latched in on
f
OSC
Atmel ATA6612/ATA6613
Leading Edge
Sample (Rising)
Setup (Rising)
Sample (Falling)
Setup (Falling)
+
1
Data setup (TXD)
Data sample (RXD)
Data setup (TXD)
Data sample (RXD)
Table
XCK
XCK
Equation for Calculating UBRRn
6-84. Note that changing the set-
UBRRn
Trailing Edge
Setup (Falling)
Sample (Falling)
Setup (Rising)
Sample (Rising)
UCPOL=1
Value
=
------------------- - 1
2BAUD
f
OSC
–
221