Emerson ATCA-S201 manual RS232 Console port, System boot overview

RTM-ATCA-SXXX Overview

3.1RS232 Console port

This port is implemented on an RJ45 connector located on the ARTM that supplies RS232 console port access. As the ATCA-S201 boots, its progress can be monitored on the console.

By default, this port is set for VT100 terminal emulation as listed in the table below.

Table 5 Console port, default terminal settings
Baud rate (bits per second)	115200
Data bits	8
Parity	None
Stop bits	1
Flow control	Off

A serial interface can be established using a null modem cable and virtually any terminal communications tool. If using a PC running Microsoft® Windows®, the user may use HyperTerminal. On Linux-based systems, Minicom can be used.

Note: Use U-boot to adjust the default baud rate below the maximum 115200 if desired.

3.1.1System boot overview

The ATCA-S201 is designed to boot and become ready for management logins without any user intervention. This is possible only if the supporting network offers DHCP. The ATCA-S201 requires no disk drives for initialization. At manufacturing time, two duplicate copies of firmware code are pre-loaded on non-volatile flash components embedded on the carrier board. These firmware images include U- boot, a Linux kernel, and the root file system (rfs) which contains the storage application services. On power-up or reset, the blade inspects jumper positions to decide whether firmware is fetched from the customer flash or a read-only factory flash. This feature allows blade recovery in situations where the customer flash has been accidently erased or corrupted. The blade boot sequence continues as the onboard CPU loads firmware and executes the code contents. If no attempts are made to halt or suspend the boot process, approximately 45 seconds later, the module is able to accept management communication logins and commands. Once booted, the blade runs entirely out of DDR2 SRAM embedded on the blade. All Ethernet ports are configured for DHCP. If DHCP is not used on your network, the ATCA-S201 Ethernet ports must be initialized manually as described in section 3.6 of this manual.

6806800H62B ATCA‐S201 Installation and Use Guide 21