System description

STA1050

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System description

Figure 2.

Complete CD Module application

STA1050 is an high integration, high performance chip which integrates most required

components for CD module application. The only external components needed are:

–

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)

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.

Spindle

Motor

Sled

OPU

Sled

Motor

Laser

RS232

Motor Driver IC

(Spindle, Focus,Tracking , Sledge, Tray)

Spindle

Motor

Sled

OPU

Sled

Motor

Laser

RS232

Motor Driver IC

(Spindle, Focus,Tracking , Sledge, Tray)

LD/MD

A, B, C, D, E, F

STA1050

LQFP128

(ROM or FLASH)

ANALOG

AUDIOOUT

I2C

HOST uP

Digital Outputs

Audio Out L/R

PDM /

STEPPING

SDRAM

(up to 64Mbit)

SDRAM

Controller

System Monitoring

SPDIF

33.8688MHz

AUX ADC

Temp

Sensor

GPIOs

RST

I2Sout

I2Sin

Digital Inputs

(from Compr . Audio Proc.)

AUX ADC

Temp

Sensor

GPIOs

RST

I2Sout

I2Sin

Digital Inputs

(from Compr . Audio Proc.)

Spindle

Motor

Sled

OPU

Sled

Motor

Laser

RS232

Motor Driver IC

(Spindle, Focus,Tracking , Sledge, Tray)

Spindle

Motor

Sled

OPU

Sled

Motor

Laser

RS232

Motor Driver IC

(Spindle, Focus,Tracking , Sledge, Tray)

LD/MD

A, B, C, D, E, F

STA1050

LQFP128

(ROM or FLASH)

ANALOG

AUDIOOUT

I2C

HOST uP

Digital Outputs

Audio Out L/R

PDM /

STEPPING

SDRAM

(up to 64Mbit)

SDRAM

Controller

System Monitoring

SPDIF

33.8688MHz

AUX ADC

Temp

Sensor

GPIOs

RST

I2Sout

I2Sin

Digital Inputs

(from Compr . Audio Proc.)

AUX ADC

Temp

Sensor

GPIOs

RST

I2Sout

I2Sin

Digital Inputs

(from Compr . Audio Proc.)