PCD6003 datasheet(67/96 Pages) PHILIPS

67 / 96 page

2001 Apr 17

Philips Semiconductors

Product speciﬁcation

Digital telephone answering machine chip

PCD6003

15.4.1

IOM DATA IN REGISTER (IOMDI)

Table 58 IOM Data In Register; reset state 00H

15.4.2

IOM DATA OUT REGISTER (IOMDO)

Table 59 IOM Data Out Register; reset state 00H

15.5

IOM Control Register (IOMC)

The bit rates, the selection of active slots on the IOM interface and the logic connection between an IOM slot and an IOM

data buffer are defined in the IOM Control Register. The IOM modes which can be selected are listed in Table 61.

Writing to the IOMC register is done via the Application Programming Interface (API) software. Please refer to the API

specification for more details.

Table 60 IOM Control Register; reset state 00H

Table 61 Selection of IOM modes

Note

1. The Speech mode is similar to the IOM slave 32 slots mode, but with a non-doubled data clock DCK.

9876543210

IOM inbound data buffer 1

IOM inbound data buffer 0

9876543210

IOM outbound data buffer 1

IOM outbound data buffer 0

43210

IOM Mode select

IOM buffer 0; slot position

spare

buffer 0

active

buffer 1

active

IOM buffer 1; slot position

IOMC[15:13]

MODE

000 or 001

Inactive (default after reset)

010

IOM Slave mode, 256 kbits/s in 4 slots/speech-frame

011

IOM Slave mode, 512 kbits/s in 8 slots/speech-frame

100

IOM Master/Slave mode, 768 kbits/s in 12 slots/speech-frame

101

IOM Slave mode, 1024 kbits/s in 16 slots/speech-frame

110

Speech Slave mode, 2048 kbits/s in 32 slots/speech-frame(1)

111

IOM Slave mode, 2048 kbits/s in 32 slots/speech-frame

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