PCA9703 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Product data sheet Rev. 4 — 5 September 2014 11 of 28
NXP Semiconductors
PCA9703
18 V tolerant SPI 16-bit GPI with maskable INT
8.2.1 SBC wake port extension with cyclic biasing
System Basis Chips (SBC) offer many functions needed for in-vehicle networking
solutions. Some of the features built into SBC are:
• Transceivers (HS-CAN, LIN 2.0)
• Scalable voltage regulators
• Watchdog timers; wake-up function
• Fail-safe function
For more information on SBC, refer to
www.nxp.com/products/interface_and_connectivity/system_basis_chips/
.
8.2.1.1 UJA106x with PCA9703, standby
• PCA9703 fits to SBC UJA106x and UJA107xA family
• PCA9703 can be powered by V1 of SBC
• Extends the SBC with 16 additional wake inputs
• C can be set to stop-mode during standby to save ECU standby current. SBC with
GPI periodically monitors the wake inputs
– Cyclic bias via V3
– Very low system current consumption even with clamped switches
– Interrupt enable control via V2
Fig 7. UJA106x with PCA9703 with supplied microcontroller (standby)
CS
SDIN
SDOUT
SCLK
002aae027
IN0
PCA9703
V
SS
V
DD
INT_EN
INT
IN1
IN15
alternate
PVR100AD-B5V0
V3
UJA106x
WAKE
V1 GND
V
CC
μC
CSN
MOSI
MISO
SCLK
GND
V2
