TNETEL1200

EtherLoop

™ MODEM

SPHS003D – FEBRUARY 1999 – REVISED JUNE 1999

6

POST OFFICE BOX 655303

Terminal Functions (Continued)

serial loop communications

TERMINAL

I/O†

DESCRIPTION

NAME

NO.

I/O†

DESCRIPTION

RXCLK

194

O

Receive clock. RXCLK is driven by the TNETEL1200 to clock receive data into the microprocessor.

RXD

198

O

Receive data. RXD is the data from the TNETEL1200 from the loop being sent to the microprocessor.

RXON

206

I

Receive on. RXON is driven by the microprocessor to enable the TNETEL1200 loop receiver.

RXRDY

201

O

Receive ready. RXRDY is driven by the TNETEL1200 to inform the microprocessor that the TNETEL1200 is

ready for receiving data from the loop.

TXCLK

196

O

Transmit clock. TXCLK is driven by the TNETEL1200 to clock transmit data out of the microprocessor.

TXD

204

I

Transmit data. TXD is the data from the microprocessor to be driven onto the loop by the TNETEL1200.

TXON

207

I

Transmit on. TXON is driven by the microprocessor to enable the TNETEL1200 loop transmitter.

TXRDY

202

O

Transmit ready. TXRDY is driven by the TNETEL1200 to inform the microprocessor that the TNETEL1200 is

ready for transmitting onto the loop.

† I = input, O = output

signal data

TERMINAL

I/O†

DESCRIPTION

NAME

NO.

I/O†

DESCRIPTION

A2D_11

A2D_10

A2D_9

A2D_8

A2D_7

A2D_6

A2D_5

A2D_4

A2D_3

A2D_2

A2D_1

A2D_0

149

148

147

146

144

143

142

141

139

138

137

136

I

Bits 11–0 of the data signal values sent from the ADC in the analog loop receiver

A2DCLK

134

O

Clock. A2DCLK is used to clock the data out of the ADC.

D2A_9

D2A_8

D2A_7

D2A_6

D2A_5

D2A_4

D2A_3

D2A_2

D2A_1

D2A_0

166

165

164

162

161

160

159

155

154

153

O

Bits 9–0 of the data signal values sent to the DAC in the analog loop transmitter

D2ACLK

168

O

Clock. D2ACLK is used to clock the data into the DAC.

INRANGE

151

I

Data overflow signal from the ADC

† I = input, O = output