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UART1_SIN,
UART1_SOUT,
RS232
XCVR
LTC2804-1
UART1
(bottom)
UART2
(top)
LS1028A
UART2_SIN,
UART2_SOUT,
NORCOMP
178-009-613R571
or equiv
Dual-stack DB9male
MUX
NX3DV221TK
To mikro-click
modules
from CPLD
CFG_MUX_UART2_SE L0
OVDD
(1.8V)
1
0
Figure 14. DUART architecture
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.
Table 14. UART configuration and setup
Configuration signal
Config register
DIP switch
Description
CFG_MUX_UART2_SEL0
BRDCFG3[5:4]
SW2[5:6]
• 0x: UART2 on DB9
connector (default value)
• 10: UART2 on mikro-click
module 1
• 11: UART2 on mikro-click
module 2
2.12 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.
CAN interface
QorIQ LS1028A Reference Design Board Reference Manual, Rev. b, 11/2018
NXP Semiconductors
COMPANY CONFIDENTIAL
33
Содержание QorIQ LS1028A
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