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SST58SD008 데이터시트(PDF) 5 Page - Silicon Storage Technology, Inc

부품명 SST58SD008
상세설명  ATA-Disk Chip
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제조업체  SST [Silicon Storage Technology, Inc]
홈페이지  http://www.sst.com/
Logo SST - Silicon Storage Technology, Inc

SST58SD008 데이터시트(HTML) 5 Page - Silicon Storage Technology, Inc

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Data Sheet
ATA-Disk Chip
SST58SD008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192
SST58LD008 / 016 / 024 / 032 / 048 / 064 / 096 / 128 / 192
5
©2001 Silicon Storage Technology, Inc.
S71167-05-000
9/01
391
1.0 GENERAL DESCRIPTION
The SST’s ATA-Disk Chip (ADC) contains a controller,
embedded firmware and Flash Media in a 32-pin DIP pack-
age. Refer to Figure 1-1 for SST’s ADC block diagram. The
controller interfaces with the host system allowing data to
be written to and read from the Flash Media.
1.1 Performance-optimized ATA Controller
The heart of the ADC is the ATA controller which translates
standard ATA signals into Flash Media data and controls.
SST’s ADC contains a proprietary ATA controller that was
specifically designed to attain high data throughput from
host to Flash. The following components contribute to the
ATA controller’s operation.
1.1.1 Microcontroller Unit (MCU)
The MCU translates ATA commands into data and control
signals required for flash memory operation.
1.1.2 Internal Direct Memory Access (DMA)
The ATA controller inside ADC uses DMA allowing instant
data transfer from buffer to memory. This implementation
eliminates microcontroller overhead associated with tradi-
tional, firmware based, memory control, increasing data
transfer rate.
1.1.3 Power Management Unit (PMU)
Power Management Unit controls the power consumption
of the ADC. The PMU dramatically extends product battery
life by putting the part of the circuitry that is not in operation
into sleep mode.
1.1.4 SRAM Buffer
A key contributor to the ATA controller performance is an
SRAM buffer. The buffer optimizes host’s data writes to
Flash Media.
1.1.5 Embedded Flash File System
Embedded Flash File System is an integral part of the
SST’s ATA controller. It contains MCU Firmware that per-
forms the following tasks:
1. Translates host side signals into Flash Media
Writes and Reads.
2. Provides Flash Media wear leveling to spread the
Flash writes across all the memory address space
to increase the longevity of Flash Media.
3. Keeps track of data file structures.
1.1.6 Error Correction Code (ECC)
The ATA Controller contains ECC algorithm that corrects
3 Bytes of error per 512 Byte sector.
FIGURE
1-1: SST ATA-DISK CHIP BLOCK DIAGRAM
391 ILL1-1.5
HOST
ATA/IDE
BUS
ATA Controller
Flash
Media
Embedded
Flash
File System
MCU
ECC
Internal
DMA
SRAM Buffer
PMU


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