TM1100 Preliminary Data Book
Philips Semiconductors
2-6
PRELIMINARY INFORMATION
File: intro.fm5, modified 7/23/99
2.5.7
Audio-In and Audio-Out Units
The audio-in and audio-out units are similar to the video
units. They connect to most serial ADC and DAC chips,
and are programmable enough to handle most serial bit
protocols. These units can transfer MSB or LSB first and
left or right channel first.
The sampling clock is driven by TM1100 and is software
programmable within a wide range from DC to 100 kHz.
Sample rates for audio-in and audio-out, as well as vid-
eo-out are separately and dynamically programmable.
The high-quality on-chip sample clock generator circuits
allows the programmer subtle control over the sampling
frequency so that audio and video synchronization can
be achieved in any system configuration. When chang-
ing the sample frequency, the instantaneous phase does
not change, which allows sample frequency manipula-
tion without introducing audio or video distortion.
As with the video units, the audio-in and audio-out units
buffer incoming and outgoing audio data in SDRAM. The
audio-in unit buffers samples in either eight- or 16-bit for-
mat, mono or stereo. The audio-out unit transfers eight-
or 16-bit sample data for mono, stereo or up to eight au-
dio channels from memory to the external DACs. Any
manipulation or mixing of sound data is performed by the
DSPCPU since this processing will require only a small
fraction of its processing capacity.
2.5.8
Synchronous Serial Interface
The on-chip synchronous serial interface is specially de-
signed to interface to high integration Analog Modem
frontends or ISDN frontend devices. In the analog mo-
dem case, all of the modem signal processing is per-
formed in the TM1100 DSPCPU.
2.5.9
I2C Interface
The I2C bus is a 2 wire multi-master, multi-slave interface
capable of transmitting up to 400 kbit/sec. TM1100 im-
plements an I2C master for use in single master environ-
ments only. This interface allows TM1100 to configure
and inspect the status of I2C peripheral devices, such as
video decoders, video encoders and some camera
types.
2.6
NEW IN TM1100
TM1100 offers significant improvements over the
TM1000:
DSPCPU and co-processor speed of 133 MHz
New
DSPCPU
instructions.
See
SDRAM speed up to 133 MHz
Support for 64 mbit (x 32) SDRAM
Video Out improvements (8 bit alpha blending,
Capability to intermix PCI2.1 and 8 bit peripherals or
ROM/Flash memories on the external bus. See
An on-chip DVD authentication/descrambling co-pro-
cessor. Information available to DVD product devel-
opers on special request.
Full 1149.1 boundary scan.
Improved
PCI
DMA
read
performance.
See