ucb1100 NXP Semiconductors, ucb1100 Datasheet - Page 23

• Manufacturer Part Number: ucb1100
• Description: Advanced Modem/audio Analog Front-end
• Manufacturer: NXP Semiconductors

Philips Semiconductors
6.7.1 SIB Data Format
The first 64 bits in the sib-frame are read and written by the
UCB1100 and they contain both audio and telecom codec data
fields, several control bits and a control register data field as is
defined in table below.
NOTE:
Since the data transfer is completely synchronous, a given control register may be written many times, before the device feeding the data has a
chance to change the control bits. The UCB1100 does detect whether the data is changed or not.
1998 May 08
Advanced modem/audio analog front-end
15–0
16
20–17
21
29–22
30
31
47–32
63–48
Sib frame bit
audio input path data [15:0];
bit 0 = MSB,
the 12 MSB bits are read.
not read but reserved
control register address [3:0];
bit 0 = MSB
write bit (write = 1)
not read but reserved
audio valid sample flag
telecom valid sample flag
telecom input path data [15:0];
bit 0 = MSB,
the 14 MSB bits are read.
control register ‘write data [15:0];
bit 0 = MSB
field definition
SIBDin
23
audio output path data [15:0];
bit 0 = MSB,
the bits [15:12] are ‘0’
fixed ‘0’
control register address [3:0];
bit 0 = MSB;
= copy of the register address as present in
the sibdin field in the same sib frame
fixed zero
fixed zeros
audio valid flag
telecom valid flag
telecom output path data [15:0],
bit 0 = MSB,
the bits [15:14] are ‘0’’
control register read data [15:0];
bit 0 = MSB
field definition
SIBDout
Preliminary specification
UCB1100