M-508/508T Data Sheet

The M-508/M-508T is a mini-mighty Linux-ready ARM9-based single board computer. Users can operate the M-508/M-508T the same way as they do on a normal Linux desktop. The M-508/M-508T comes equipped with one Ethernet, four RS-232/485 ports, two USB 2.0 host ports, plus one SD memory card slot and 32x GPIOs in an incredible small package measuring only 105x 75mm.

Operates in -20 to 80C Environment (M-508T)

The M-508T is especially designed to withstand environmental extremes. All the major components used by the M-508 are of industrial grade, to ensure continuous operation in -20 to 80C temperature range.

512KB Non-volatile SRAM (M-508T)

For critical applications, working data needs to be safely kept while system power goes down incidentally. The M-508T provides 512KB non-volatile SRAM for fast and safe data retention, eliminating the need of an trouble-making external battery.

Four 921.6Kbps RS-232/485 TTY Ports

The M-508 provides four 921.6Kbps RS-232/485 TTY ports. Port 1, 2, 3 support standard RS-232/485. Port 4 supports RS-232/422/485. Port 2 also features full RS-232 supporting for modem connection.

Thirty-two CMOS-level GPIOs

The M-508 comes with 32x CMOS-level digital I/Os. Each I/O pin can be individually programmed as input or output.

H/W Specifications

CPU/Memory

CPU: ATMEL 180MHz AT91RM9200 (ARM9, w/MMU)
Memory: 64MB SDRAM, 32MB Flash
SRAM: 512KB, non-volatile (M-508T only)

Network Interface

One port, 10/100BaseT, RJ-45 connector
Protection: 1.5KV magnetic isolation

TTY (Serial) Ports

Four RS-232/485 ports, software select
Port 2: supports full modem signals
Port 4: also supports RS-422 mode
Connector: 10-pin header, male

TTY (Serial) Port Parameters

Baud Rate: up to 921.6 Kbps
Parity: None, Even, Odd, Mark, Space
Data Bits: 5,6,7,8
Stop Bit: 1, 1.5, 2 bits
Flow Control: RTS/CTS, XON/XOFF, None

USB 2.0 compliant Host Ports

Two ports, supports low-speed (1.5Mbps) and full- speed (12Mbps) data rate

CMOS-level Digital I/Os (GPIO)

No. of pins: thirty-two pins
Each pin can be programmed as input or output

Mass Storage

One SD 1.0 compliant socket

General

WatchDog Timer: yes, for kernel use
Real Time Clock: yes
Buzzer: yes
Power input: +5VDC, 600mA typical
Dimension: 105 x 75mm
Operation Temperature:
M-508: 0 to 70C(32 to 158F)
M-508T: -20 to 80C(-4 to 176F)
Regulation: CE Class A, FCC Class A

TTY Pin Assignment

PIN	RS-232	RS-485	RS-422 **
1	DCD *	---	Tx-
2	DSR *	---	---
3	Rx	---	Tx+
4	RTS	---	---
5	Tx	Data+	Rx+
6	CTS	---	---
7	DTR *	Data-	Rx-
8	---	---	---
9	GND	GND	GND
10	---	---	---

* Port 2 only ** Port 4 only

Introduction

Operates in -20 to 80C Environment (M-508T)

512KB Non-volatile SRAM (M-508T)

Four 921.6Kbps RS-232/485 TTY Ports

Thirty-two CMOS-level GPIOs

H/W Specifications

S/W Specifications

TTY Pin Assignment

Ordering Information

M-508

M-508T