Can Interface - NXP Semiconductors QorIQ LS1028A Reference Manual

LS 1028A
OVDD
(1.8V)
The UART2 signals can be used either to communicate with mikro-click modules or with
RS232-compliant devices using the LTC2804-1 transceiver. The selection is done
through a mux which is controlled through the CFG_MUX_UART2_SEL0 signal by
CPLD.
Configuration signal
CFG_MUX_UART2_SEL0

2.11 CAN interface

The LS1028A processor supports two controller area network (CAN) modules, CAN1
and CAN2. On the LS1028ARDB, the CAN ports are available for external connection
through a dual-port stacked DB9 male connector. Two high-speed CAN transceivers
TJA1051T/3 from NXP (U54 and U56) provide an interface for the CAN ports to send
and receive CAN signals to and from the processor. The TJA1052T/3 transceivers can
support data rate of up to 5 Mbit/s in CAN with Flexible Data-Rate (CAN FD) phase.
The figure below shows the CAN architecture.
QorIQ LS1028A Reference Design Board Reference Manual, Rev. A, 02/2018
NXP Semiconductors
CFG_MUX_UART2_SEL0
from CPLD
MUX
UART2_SIN,
NX3DV221TK
UART2_SOUT,
UART1_SIN,
UART1_SOUT,
Figure 2-11. DUART architecture
Table 2-9. UART configuration and setup
Config register
BRDCFG3[5:4]
Confidential Proprietary
Chapter 2 LS1028ARDB Functional Description
1
0
RS232
XCVR
LTC2804-1
DIP switch
SW2[5:6]
To mikro-click
modules
Dual-stack DB9 male
UART2
(top)
UART1
(bottom)
NORC OMP
178-009-613R571
or equiv
Description
• 0x: UART2 on DB9
connector (default
value)
• 10: UART2 on mikro-
click module 1
• 11: UART2 on mikro-
click module 2
35