E981.12A39BB ELMOS Semiconductor, E981.12A39BB Datasheet - Page 37

• Manufacturer Part Number: E981.12A39BB
• Description: Interface - Specialized Dual I/O Link Master Transciever
• Manufacturer: ELMOS Semiconductor

Specifications of E981.12A39BB

• Rohs: yes
• Product Type: Dual I/O link Master Transceiver
• Operating Supply Voltage: 3.3 V
• Supply Current: 5.5 mA
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-44
• Minimum Operating Temperature: - 40 C

Dual IO-Link Master Transceiver with UARTS
E981.12
ADVANCE PRODUCT INFORMATION - JUL 26, 2011
6.5.2
TRX Buffer Burst Access
This access type is used for the UART TRX buffer (see chapter „Transceiver UART“).
During burst access the second byte will contain the information about the number of data bytes which
are read or written during SPI communication.
SPI transfer is secured by a XOR checksum to detect SPI communication errors. The last byte of the
host transmission contains the XOR checksum byte. For host write acces the E981.12 compares this
checksum with the calculated checksum. For host read access the host has to compare this checksum
with the calculated checksum.
Transmission error is indicated by an interrupt XORIRQ in register ISTAT. This interrupt can not be
masked.
Fig. 17: UART buffer burst write access
Fig. 18: UART buffer burst read access
This document contains information on a new product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.
ELMOS Semiconductor AG
Data Sheet 37 / 44
QM-No.: 25DS0069E.00