ASAHI KASEI

[AKD4112B-B]

<KM080200>

2005/10

- 5 -

(2) Evaluation for TX

S/PDIF in (optical or BNC)– AK4112B – S/PDIF out (optical or BNC)

a. Set-up of a Bi-phase output signal

As for TX, only the loop back mode of RX corresponds. In serial mode, it can be selected by OPS1-0 bits.

This mode is not supported in parallel mode.

Connector

JP13 (TX)

Optical (PORT4)

OPT

BNC (J4)

BNC

Table 10. Set-up of TX

Serial control

The AK4112B can be controlled via the printer port (parallel port) of IBM-AT compatible PC. Connect PORT6

(uP-I/F) with PC by 10-line flat cable packed with the AKD4112B-B. Take care of the direction of connector. There

is a mark at pin#1. The pin layout of PORT6 is as Figure 3.

Mode

SW1_6

JP18

Parallel

H

CDTO/CM0=“H” or CM0=“L”

Serial

L

SDA and CM0=“L” short

Table 11. Set-up of parallel mode and serial mode

PORT6

uP I/F

10

9

2

1

Figure 3. PORT6 pin layout

This evaluation board encloses control software. A software operation procedure is included in an evaluation board

manual.