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PDF AT78C1501 Data sheet ( Hoja de datos )
| Número de pieza | AT78C1501 | |
| Descripción | DVD / CD ATAPI CONTROLLER | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Host Interface
– ATAPI Compatible (ANSI ATA-1, ATA-2, ATA-3 and ATA-4 compliant) Host Mode
– Ultra DMA Support (66 MB/sec)
– High-current (12 mA) Drivers for Direct Connection to AT Cable (slew rate
controlled)
– 256-byte Bidirectional Data FIFO to Improve Throughput
• Embedded Processor
– ARM7TDMI™ RISC Processor
– Open Processor Architecture Protects Firmware Investment
– Wide Selection of Development Tools from ARM® and Third-party Vendors
– 1-Mbyte External Flash Interface for Code/Data
– 16-Kbyte Internal SRAM for Data
• Buffer Manager
– Supports SDRAM up to 32 Mbytes (16M x 16)
– DRAM Bandwidth of up to 160 Mbytes/sec (burst)
– Priority Buffer Arbiter
• Read Channel Interface
– Nibble Interface Speed (code cell rate): 40 MHz (160 Mbs, DVD 5X)
– EFM (8/14) and EFM+ (8/16) Demodulation
• Write Channel Interface
– Serial Interface Speed (code cell rate): DVD 2X
– EFM (8/14) and EFM+ (8/16) Modulation
– DVD-R Pre-pit Decoder with Error Detection and Correction
– DVD+RW ADIP Decoder with Error Detection and Correction
– CD-R/RW ATIP Decoder with Error Detection
• Error Correction Logic
– DVD Data Block Error Detection and Correction
– DVD EDC Error Detection
– DVD IEC Header Error Detection and Correction
– All CD Formats
• Lower Power Operation with 3.3V Core and 5V Tolerant I/Os
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DVD/CD ATAPI
Controller
AT78C1501
Description
The Atmel AT78C1501 is a high-performance DVD/CD ATAPI Ultra DMA66 Interface
Controller, designed to interface to the AT78C1502 DVD Servo Controller, the
AT78C1503 DVD Read Channel and the AT78C1504 Automatic Laser Power Control
(ALPC). The interface controller (AT78C1501) contains ARM® and AVR® microcontrol-
lers, buffer management, error correction code (ECC) and encoder/decoder (ENDEC)
for DVD and CD. Also included are a writeable control store for timing generation and
an on-board frequency synthesizer to generate system frequencies from one crystal.
ATA66/ATAPI66 and I2S interfaces are provided.
The major functions of the AT78C1501 include data format encoding/decoding, error
detection/correction, buffer management, ATAPI host interface and serial interface
master. The AT78C1501 also includes an embedded ARM7 RISC Core to perform all
system (drive) microprocessor functions and an embedded AVR RISC core to perform
internal data path and buffer management control.
The AT78C1501 disk formats include DVD-ROM, DVD-RAM (Read/Write), CD-ROM,
CD-R (Read/Write), CD-RW (Read/Write), DVD-R (Read/Write), DVD-RW
(Read/Write), and DVD+RW (Read/Write).
Rev. 2049A–DVD–07/02
1
1 page  
AT78C1501
ATAPI Interface
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The AT78C1501 supports the ATAPI CD-ROM specification (IDE CD-ROM Interface)
and can drive IDE signals directly. The host interface contains a 12-byte command
packet FIFO and IDE registers for transferring command and status data. The host inter-
face also contains a data FIFO for transferring data from buffer DRAM to the host. The
host interface contains the following pins:
Table 2. ATAPI Interface I/O Pin List
Pin Name
Pin # Pin Type Pin Description
CS0-
205 I Device Chip Select 0: Chip select signal from host to select the Command Block registers.
CS1-
204 I Device Chip Select 1: Chip select signal from host to select the Command Block registers.
DD[15]
DD[14]
DD[13]
DD[12]
DD[11]
DD[10]
DD[9]
DD[8]
DD[7]
DD[6]
DD[5]
DD[4]
DD[3]
DD[2]
DD[1]
DD[0]
13 I/O
15 I/O
17 I/O
19 I/O
22 I/O
24 I/O
26 I/O
28 I/O Device Data Bus: Bidirectional data bus between the host and the device. The lower eight
29 I/O bits are used for 8-bit register transfers. Data transfers are 16 bits wide.
27 I/O
25 I/O
23 I/O
20 I/O
18 I/O
16 I/O
14 I/O
DASP-
203
I/O
Device Active or Slave Present: This is a time-multiplexed signal that indicates that a device
is active or that Device 1 is present.
DA[2]
DA[1]
DA[0]
206
3
I
Device Address: This is the 3-bit binary coded address asserted by the host to access a
register or data port in the device.
207
DMACK-
5
I
DMA Acknowledge: This signal shall be used by the host in response to DMARQ- to initiate
DMA transfers.
DMARQ-
DMA Request: This signal, used for DMA data transfers between the host and device, shall
be asserted by the device when it is ready to transfer data to or from the host. The direction
11 O of data transfer is controlled by DIOR- and DIOW-. This signal is used in a handshake
manner with DMACK, i.e., the device shall wait until the host asserts DMACK, before
negating DMARQ and reasserting DMARQ, if there is more data to transfer.
INTRQ
Device Interrupt: This signal is used by the selected device to interrupt the host system.
4
O
When the nIEN bit is cleared to “0” and the device is selected, INTRQ shall be enabled
through a tristate buffer. When the nIEN bit is set to “1” or the device is not selected, the
INTRQ signal shall be in a high impedance state.
2049A–DVD–07/02
5
5 Page 
Servo Interface
Serial Interface
I2S Audio Interface
Sony® Philips® Digital
Audio Interface
AT78C1501
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The Servo Interface connects the servo device to the controller.
Table 8. Servo Interface I/O Pin List
Pin Name
Pin # Pin Type Pin Description
SERVO_INT
147
I
Servo Interrupt Input: Interrupt signal from the
servo to the controller
SERVO_INT_ACK 149
O
Servo Interrupt Acknowledge: Interrupt
acknowledge from the controller to the servo
CTRL_INT
150
O
Controller Interrupt Output: Interrupt signal from
the controller to the servo
CTRL_INT_ACK
151
I
Controller Interrupt Acknowledge: Interrupt
acknowledge from the servo to the controller
Servo Fault: Indicates that some kind of fault has
SERVO_FAULT 152 I occurred in the servo or read channel. This is
used to gate off any disk write functions.
The Serial Interface connects all slave devices to the controller.
Table 9. Serial Interface I/O Pin List
Pin Name
Pin # Pin Type
SCLK
186 O
SDATA
184 I/O
SDEN1
183 O
SDEN2
182 O
Pin Description
Serial Clock
Serial Data
Serial Enable 1
Serial Enable 2
The I2S Audio Interface is a serial interface for external audio devices.
Table 10. I2S Audio Interface I/O Pin List
Pin Name
Pin # Pin Type Pin Description
SCK
201 O Serial Clock
WS 200 O Word Select
SD 100 O Serial Data
The Sony Philips Digital Audio Interface is a standard digital interface for external audio
devices.
Table 11. Sony Philips Digital Audio Interface I/O Pin List
Pin Name
Pin # Pin Type Pin Description
SPDIF_OUT
92 O Sony Philips Digital Interface
2049A–DVD–07/02
11
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| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet AT78C1501.PDF ] | |
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