E981.12A39BB ELMOS Semiconductor, E981.12A39BB Datasheet - Page 31

• 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
6.3.7
Wake-Up
The wakeup signal can be generated by external microcontroller using the parallel interface (TXEN,
TXD, RXD) or integrated wakeup support.
If the wake-up generation support for the port is enabled in WTIM CFG, the device will generate a
signal at CQ_OUTx depending on the CQ_INx level. To apply a wake-up, select Wake-up support
register for channel x. The exact pulse timing is generated internally. For details see chapter 6.3.7.1.
The delay between RXDx evaluation and Wake-up pulse is minimized to reduce collisions by level
change of external devices (race condition of wakeup signal and fast changes of device SIO-mode
signal)
If the IOLINK master is requested to send a wake-up symbol, the transmitter is turned on for a time
T
in order to perform a level inversion at pin CQ_OUTx. A maximum current (limit I
or I
) will
d_WU
LIM_L
LIM_H
be delivered for time T
. The slave is expected to release the C/Q bus during this time. Afterwards
d_WU
the transmitter drives pin CQ_OUTx to the pre- wake-up pulse level and then turns off for a recovery
time of T
.
d_off_WU
Fig. 14: Wake up procedure
The WURQ timer generates the specified IO-Link wake up request signal for both IO-Link channels
selected by bits CH1 / CH2 in register WTIM_CFG.
The wake up sequence is started immediately after SPI setting bit START in register WTIM_CFG. The
host micro controller can poll WURQ status information or enable a „wakeup completed interrupt“.
After T
the transmitter is ready to transmit and responds to requests from either TXENx and TXDx
d_off_wu
or the UART.
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 31 / 44
QM-No.: 25DS0069E.00