MAX14827 Datasheet, PDF (20/41 Pages) Maxim Integrated Products – Integrated LED Driver

MAX14827
IO-Link Device Transceiver
Pin Description (continued)
PIN
TQFN WLP
16
C4
NAME
UARTSEL
PIN
DESCRIPTION
UART Interface
Select Logic
Input
FUNCTION
PARALLEL MODE
(SPI/PIN = high)
MULTIPLEXED
MODE
(SPI/PIN = high)
UARTSEL = Low
UARTSEL = high
Drive UARTSEL
low to use
RX, TX, and
TXEN for UART
signaling.
When CS/PP is high,
use SDO/RX/THSH,
SDI/TX/NPN, and CLK/
TXEN/200MA for UART
signaling.
PIN MODE
(SPI/PIN = low)
UARTSEL is inactive when
SPI/PIN is low.
The logic on the DO output is the inverse
The logic on the DO output
17
D5
LO
DO Driver
Logic Input
logic-level of the signal on the LO input.
Configure, control, and monitor the DO
output through the logic pins or through the
is the inverse logic-level of
the signal on the LO input.
Configure the DO driver with
SPI interface.
the pin-mode inputs.
18
D4
WU
Wake-Up
Request Push-
Pull Output
WU asserts low for 200μs when an IO-Link 80μs wake-up condition is
detected on the C/Q line.
Drive LED1IN high or low to enable/disable Drive LED1IN high to turn
19
E5
LED1IN
LED1 Driver
Logic Input
the LED1 driver. The LED1 driver can also on the LED connected to
be controlled through the SPI interface. See LED1. Drive LED1IN low to
Table 2.
turn the LED driver off.
Open-Drain IRQ/OC asserts when any bit in the
IRQ/OC asserts low when
20
E4
IRQ/OC
Interrupt/
Over-current
INTERRUPT register is set. IRQ/OC
deasserts when the INTERRUPT register is
the load current on the C/Q
or DO output exceeds the
Output
read.
set current limit.
21
D3
SDO/
RX/
THSH
SPI Serial Data
Output/
RX Logic
Output/
Thermal
Shutdown
Indicator
SPI serial data
output
When CS/PP is high, the
SPI interface is disabled
and UART interface
mode is enabled. SDO/
RX/THSH is the logic
inverse of C/Q.
SDO/RX/THSH asserts low
when the IC enters thermal
shutdown. SDO/RX/THSH
deasserts when the device
returns to normal operation.
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