AeroComm Corporation PKLR2400-200 ユーザーズマニュアル

AC5124-10 Specifications

11/24/03

7.1.19.1

7.1.19.1 Turbo Mode

Turbo Mode

EEPROM Address: 4Fh, bit 1
Length: 1 Bit
Default: 0
Range: 0 or 1

If bit 1 is set to a value of 0, a transceiver will operate in CSMA mode, allowing random back-off for
collision avoidance. In CSMA Mode, a transceiver will wait one packet time between successful
packets. If a collision occurs, a transceiver will wait a random number of packet times before
resending its data. The amount of randomness is controlled by the Random Back-Off parameter
located at EEPROM address 45h. See Section 6.1.12, Random Back-Off

Section 6.1.12, Random Back-Off

Section 6.1.12, Random Back-Off for details on this parameter.

When bit 1 is set to a value of 1, a transceiver will operate in Turbo Mode. Turbo Mode was designed
strictly for high-speed point-to-point communications, as it has no back off between errors. In other
words, it eliminates the wait time between successful packets and will transmit packets immediately,
one after the other. If the packet is not successfully received, a transceiver will just resend the packet
until a successful receipt is acknowledged.

7.1.19.2

7.1.19.2 Baud Rate Double

Baud Rate Double

EEPROM Address: 4Fh, bit 4
Length: 1 bit
Default: 0
Range: 0 or 1

Setting this bit to a value of 1 will double the baud rate programmed in the Baud High and Baud Low
bytes at EEPROM addresses 40h and 41h, respectively. See Section 6.1.10, Baud High (BH) and

Section 6.1.10, Baud High (BH) and

Baud Low (BL)

Baud Low (BL) for a table of calculated values for common baud rates and for a formula to calculate
custom baud rates. The OEM must ensure that the doubled baud rate does not exceed 882 Kbps.

7.1.19.3

7.1.19.3 485 RTS

485 RTS

EEPROM Address: 4Fh, bit 5
Length: 1 Bit
Default: 0
Range: 0 or 1

Setting this bit to a value of 1 will enable Pin 27 to function as a Driver and Receive Enable for RS485
systems. Setting this bit to a value of 0 will allow the RTS to function as programmed in bit 3 of the
Serial Interface Mode byte located at EEPROM address 4Ah.

7.1.19.4

7.1.19.4 In Range Select

In Range Select

EEPROM Address: 4Fh, bit 6
Length: 1 Bit
Default: 0
Range: 0 or 1

Normally, Pin 15 is IN_RANGE; however, setting this bit to a value of 1 will move IN_RANGE to Pin 28.
This is useful for applications using Read Switches, which uses Pin 15 for changing the Server/Client
Mode.