Microsd Socket; Serial Ports; Uart0; Uart1 - VersaLogic Hawk Reference Manual

microSD Socket

The Hawk provides a microSD socket on the baseboard (J10). The VL-F41 series of microSD
cards provide solid-state storage of 2 GB, 4 GB, or 8 GB. The microSD socket accommodates
cards with up to 32 GB of storage capacity.

Serial Ports

The Hawk provides two serial ports. Both ports can be operated in RS-232 or RS-422 mode. IRQ
lines are chosen in CMOS Setup. The UARTs for the two ports are implemented differently. The
following two subsections describe the unique characteristics of each UART.

UART0

UART0 provides a 16550-based serial port driven by a 48 MHz clock. The operating system
should configure the clock rate in the UART Driver and UART Clock in the Packet Hub Driver
for proper functionality.

UART1

UART1 is a PCI memory-mapped I/O port. For information on how to implement this UART,
refer to the Intel Atom Processor E3800 Product Family Design-in

COM Port Configuration

Jumper block V2 configures the serial ports for RS-232 or RS-422 operation. See the section
titled "Jumper Blocks" on page 16 for details. The termination resistor should be enabled for RS-
422 endpoint stations. Termination is not used for RS-232 intermediate stations.

Serial Port Connectors

Table 12 lists the pinouts of the DB9M serial port connectors on the VL-CBR-5016 paddleboard.
These connectors use IEC 61000-4-2-rated TVS components to help protect against ESD
damage.
VL-EPU-3310 Reference Manual
Table 12: COM1 and COM2 Pinouts – VL-CBR-5016 Connector J2
DB9 Pin
1
2
3
4
5
6
7
8
9
Guide.
RS-232 RS-422
— —
RXD RxD-
TXD TxD-
— —
Ground Ground
— —
— TxD+
— RxD+
— —
Interfaces and Connectors
32