Table 9-3 Interrupt overview
E-Link daughter card
Previously, an on-board circuit switches the 0_6_12V signal to
be 0V, 6V or 12V. This circuit is removed. Instead, the SCART0
and SCART1 signals are now directly available at the module
interface (pins 3 and 4 of connector 1800).
The SD5.31 module has two I2C buses. The slave I2C is using
hardware I2C (because of its speed) and the master uses
software I2C via GPIO ports.
The master I2C bus controls all on-board devices e.g. NVRAM,
audio DAC etc., while the slave I2C bus is used to connect to
an external processor e.g. a TV or Audio set microprocessor,
which acts as the I2C master controller.
An additional signal (I2C_INT) can be used to flag to the
external processor when data is available in the slave mode.
Two external I2S inputs can be connected to Ziva-5. However,
only one input can be used at any one time as they are
multiplexed inside the chip. On SD5.31, one input is coming
from an SPDIF-I2S converter (e.g. external source on an audio
set), while the other is from an external source (e.g. a TV
receiver audio section). The slash version of the module will
decide which input is used. Only 2-channel PCM I2S up to 96
kHz is currently supported.
Service Port Buffer
Figure 9-7 Service Port Buffer
The service port (see diagram M7) is simplified to reduce cost.
The unused RTS and CTS lines are no longer connected. A
transistor buffer (item 7702) is used instead of the Schmitt
Circuit Descriptions, List of Abbreviations, and IC Data Sheets
Ziva-5 Pin nr.
Figure 9-8 Block diagram motor drivers
The following motor driver ICs are controlled by the Ali M5705:
The spindle motor driver.
The servo motor driver.
Both ICs require a reference voltage (MVREF2) of 2.1 V. This
voltage is generated with IC 7002 (pin 26 provides a reference
bias voltage of 2.5 V) and buffered with OpAmp 7003-A.
Spindle Motor Driver
The spindle motor interface provides both motor control signals
from the demodulator and, in addition, contains a tachometer
loop that accepts tachometer pulses from the (hall) motor unit.
They drive the motor IC (BA6849FP, item 7101).
Three-phase, full wave, pseudo-linear drive system.
Built-in power save and thermal shutdown functions.
Built-in current limiter and Hall bias circuits.
Built-in rotation direction detector.
Built-in reverse rotation prevention circuits.
Servo Motor Driver
The BA5954FP (item 7100) is a 4-channel motor driver with
built-in current feedback. Sensing is done via resistors 3110//
3112 for focus signals (pin 7) and resistors 3114//3115 for the
tracking signals (pin 20).
This driver controls the following motors:
Sledge motor (SL+ and SL-).
Loader motor (LD+ and LD-).
Focus motor (FO+ and FO-).
Tracking motor (TR+ and TR-).
Wide dynamic range.
Level shift circuit built-in.
Thermal shutdown circuit built in (at 175 deg. C.).
Stand-by mode built-in.