sta1050 STMicroelectronics, sta1050 Datasheet - Page 8

• Manufacturer Part Number: sta1050
• Description: Cd-audio One-chip
• Manufacturer: STMicroelectronics

System description
3
Figure 2.
8/11
(Spindle, Focus,Tracking, Sledge, Tray)
(Spindle, Focus,Tracking, Sledge, Tray)
(Spindle, Focus,Tracking, Sledge, Tray)
(Spindle, Focus,Tracking, Sledge, Tray)
Motor Driver IC
Motor Driver IC
Motor Driver IC
Motor Driver IC
Laser
Laser
Laser
Laser
Sled
Sled
Sled
Sled
Complete CD Module application
System description
STA1050 is an high integration, high performance chip which integrates most required
components for CD module application. The only external components needed are:
STA1050 includes an embedded 8-bit CPU (ST7) running from an internal ROM (or Flash
for debug) Program memory.
The laser diode is driven directly using an embedded power PMOS.
2 analog inputs and 8GPIOs are available to monitor sensors and switches or to control
auxiliary circuitry.
An embedded Audio DAC generates a stereo audio output. This DAC can use as input a
digital stream received by the I2Sin interface from an external source, for example a
compressed audio processor.
Several digital outputs are available: SPDIF, I2S, EIAJ and a MLB (Media Local Bus)
interface which allows STA1050 to be directly interfaced to current and future MOST
networks.
OPU
OPU
OPU
OPU
–
–
–
Temp
Temp
Temp
Temp
Sensor
Sensor
Sensor
Sensor
a ceramic oscillator with a nominal frequency of 33.8688 MHz. All frequencies
needed in STA1050 are internally synthesised thanks to a PLL.
a motor driver IC to drive focus, tracking, spindle, sledge and tray motors
a SDRAM to implement shock-proof handling (if needed)
Spindle
Spindle
Spindle
Spindle
Motor
Motor
Motor
Motor
Sled
Sled
Sled
Sled
Motor
Motor
Motor
Motor
A, B, C, D, E, F
A, B, C, D, E, F
LD/MD
LD/MD
PDM /
PDM /
STEPPING
STEPPING
AUX ADC
AUX ADC
AUX ADC
AUX ADC
33.8688MHz
33.8688MHz
(ROM or FLASH)
(ROM or FLASH)
STA1050
STA1050
GPIOs
GPIOs
GPIOs
GPIOs
LQFP128
LQFP128
Controller
Controller
(up to 64Mbit)
(up to 64Mbit)
SDRAM
SDRAM
RST
RST
RST
RST
SDRAM
SDRAM
AUDIOOUT
AUDIOOUT
ANALOG
ANALOG
RS232
RS232
RS232
RS232
I2Sout
I2Sout
I2Sout
I2Sout
SPDIF
SPDIF
I2Sin
I2Sin
I2Sin
I2Sin
I2C
I2C
Digital Outputs
Digital Outputs
HOST uP
HOST uP
System Monitoring
System Monitoring
Digital Inputs
Digital Inputs
Digital Inputs
Digital Inputs
(from Compr . Audio Proc.)
(from Compr . Audio Proc.)
(from Compr . Audio Proc.)
(from Compr . Audio Proc.)
Audio Out L/R
Audio Out L/R
STA1050