Ver.1.02

COM-2(FIT)GY

3

This product can operate in two modes: the compatible mode,

in which this product, when connected to CONTEC’s

microcontroller unit, acts as a standard serial port; and the

enhanced mode, in which this product operates under

CONTEC’s unique control method.

Before building a system

using this product, a working understanding of the features of

these modes may be in order.

CAUTION

To use four or more channels of COM in the Windows

environment, select the enhanced mode, and then use the

COM-DRV(W32) driver.

(Ex.: Device ID-No. 04h, 07h, 0Ch)

The I/O address and IRQ that can be configured differs

according to the connection source microcontroller. For the

CPU-SBxx Series, refer to Table 1. For the BX-300 Series,

refer to Table 2.

Compatible Mode

This product can use two channels as standard serial ports.

Channels CH0 of this product can be assigned to COM3, and

CH1 to COM4.

In the compatible mode, this product uses one interrupt level

per channel.

When adding two channels, you need to ensure that at least

two interrupt levels are available.

For I/O addresses, the

addresses that are assigned to the standard serial ports can be

used.

Because these addresses can are treated as standard

serial ports, they can be accessed by using commonly

available driver software that can handle standard serial ports.

Enhanced Mode

The enhanced mode operates this product by using CONTEC's

unique control method.

The enhanced mode controls two channels at one interrupt

level.

Therefore, the channels can be operated even when

only one interrupt level is available.

For I/O addresses,

CONTEC-designated addresses must be used.

When the COM-DRV(W32) driver is used, it can be used in the

same way as a standard serial port.

CAUTION

When using it in the OS other than Windows, user needs to

create the device driver for enhanced mode.

I/O Address

CH0

CH1

ID No.

Function

I/O address

(h)

Interrupt

level

Function

I/O address

(h)

Interrupt

level

0

COM3

03E8 - 03EF

IRQ5

COM4

02E8 - 02EF

IRQ7

1

COM3

03E8 - 03EF

IRQ5

COM4

02E8 - 02EF

Not used

2

COM3

03E8 - 03EF

Not used

COM4

02E8 - 02EF

IRQ7

3

COM3

03E8 - 03EF

Not used

COM4

02E8 - 02EF

Not used

4

Enhanced

01A0 - 01A7

IRQ5

Enhanced

01A8 - 01AF

IRQ5

5

Enhanced

01A0 - 01A7

IRQ7

Enhanced

01A8 - 01AF

IRQ7

6

Enhanced

02A0 - 02A7

IRQ5

Enhanced

02A8 - 02AF

IRQ5

7

Enhanced

02A0 - 02A7

IRQ7

Enhanced

02A8 - 02AF

IRQ7

8

Enhanced

9800 - 9807

IRQ9

Enhanced

9808 - 980F

IRQ9

9

Enhanced

9820 - 9827

IRQ5

Enhanced

9828 - 982F

IRQ7

A

Enhanced

9840 - 9847

IRQ7

Enhanced

9848 - 984F

IRQ9

B

Enhanced

9860 - 9867

Not used

Enhanced

9868 - 986F

Not used

C

Enhanced

0700 - 0707

IRQ9

Enhanced

0708 - 070F

IRQ9

D

Enhanced

0720 - 0727

IRQ7

Enhanced

0728 - 072F

IRQ7

E

Reserved

Reserved

Reserved

Reserved

Reserved

Reserved

F

Reserved

Reserved

Reserved

Reserved

Reserved

Reserved

I/O Address(When connected to the BX-300 Series)

CH0

CH1

ID No.

Function

I/O address

(h)

Interrupt

level

Function

I/O address

(h)

Interrupt

level

0

COM3

03E8 - 03EF

IRQ5

COM4

02E8 - 02EF

IRQ7

1

COM3

03E8 - 03EF

IRQ5

COM4

02E8 - 02EF

Not used

2

COM3

03E8 - 03EF

Not used

COM4

02E8 - 02EF

IRQ7

3

COM3

03E8 - 03EF

Not used

COM4

02E8 - 02EF

Not used

4

Enhanced

01C0 - 01C7

IRQ5

Enhanced

01C8 - 01CF

IRQ5

5

Enhanced

01C0 - 01C7

IRQ7

Enhanced

01C8 - 01CF

IRQ7

6

Enhanced

02C0 - 02C7

IRQ5

Enhanced

02C0 - 02C7

IRQ5

7

Enhanced

02C0 - 02C7

IRQ7

Enhanced

02C0 - 02C7

IRQ7

8

Enhanced

9800 - 9807

IRQ10

Enhanced

9808 - 980F

IRQ10

9

Enhanced

9820 - 9827

IRQ5

Enhanced

9828 - 982F

IRQ7

A

Enhanced

9840 - 9847

IRQ7

Enhanced

9848 - 984F

IRQ9

B

Enhanced

9860 - 9867

Not used

Enhanced

9868 - 986F

Not used

C

Enhanced

0700 - 0707

IRQ10

Enhanced

0708 - 070F

IRQ10

D

Enhanced

0720 - 0727

IRQ7

Enhanced

0728 - 072F

IRQ7

E

Reserved

Reserved

Reserved

Reserved

Reserved

Reserved

F

Reserved

Reserved

Reserved

Reserved

Reserved

Reserved

CAUTION

Please use it excluding Device ID No. 8, 9, A, B when using

in the Windows environment.

The module uses the XR16C2850 (Exar Corporation) upward

compatible with the 16550 UART.

For details on the internal resisters of the XR16C2850 and its

control, refer to the XR16C2850 data sheet.

In enhanced

mode, “starting I/O address + 1Fh” is used as an interrupt

vector resister.

I/O Ports

Starting I/O

D7

D6

D5

D4

D3

D2

D1

D0

address +0h

+1h

+2h

+3h

+4h

+5h

+6h

+7h

Channel 0 resister

+8h

+9h

+Ah

+Bh

+Ch

+Dh

+Eh

+Fh

Channel 1 resister

+1Fh

Interrupt vector resister

CAUTION

Each port must be accessed in bytes to conform to device

specifications.

Non-byte access to any port is not allowed (such as word

access or doubleword access).

I/O Ports and Registers

Compatible and Enhanced Modes