PSB2132 Просмотр технического описания (PDF) - Siemens AG

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PSB2132

Two Channel Codec Filter for Terminal Applications SICOFI®2-TE

Siemens AG 

PSB 2132

PSB 2134

Functional Description

CS

DCLK

DIN

DOUT

76543210

Control

High ’Z’

7654321076543210

Identification

Data Byte 1

High ’Z’

ITD09771

Figure 7

Example for a Read Access, with One Data Byte Transferred via DOUT

The data transfer is synchronized by the DCLK input. The contents of DIN is latched at

the rising edge of DCLK, while DOUT changes with the falling edge of DCLK. During

execution of commands that are followed by output data (read commands), the device

will not accept any new command via DIN. The data transfer sequence is completed by

setting CS to high.

To reduce the number of connections to the µP DIN and DOUT may be strapped

together, and form a bi-directional data-‘pin’.

For special applications a byte by byte transfer is needed. This can be done by

prolonging the high time of DCLK for a user defined ‘waiting time’ after transferring any

byte.

CS

DCLK

DATA

76543210

Control-Byte

High ’Z’

7654321 0 76543210

Identification

Data Byte 1

ITD09772

Figure 8

Example for a Write/Read Access, with a Byte by Byte Transfer, and DIN and DOUT

Strapped Together

The Identification Byte is “81H” for the PSB 2132/34.

Semiconductor Group

20

09.97

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