Samsung DVD-R155 Service Manual page 123

8) ATAPI Features
ΠFully compatible with ATAPI Specification SFF-8020i(expired) and SFF8090i(v5.3)
´ ATA/ATAPI command and control registers contained in the ATAPI register set.
ˇ Automatic Power Management
¨ Advanced CD cache manager for low CPU Utilization rate and auto data transfers.
ˆ External 16bit wide buffer supports up to 16MBytes SDRAM
Ø Supports both physical or block addressing modes for Micom buffer access (byte/word mode)
∏ True real-time hardware/firmware ATAPI compatibility.
" Hardware implementation of ATAPI packet command receiving.
' Supports PIO, DMA, and UDMA modes.
˝ Automated command completion control for all ATAPI commands.
Ô Automated protocol control on block transfers for ATAPI read commands.
 Supports automatic sync pattern search and protection for DRAM data
Ò Audio Playback in CAV Mode support
Ú Direct register access to facilitate low firmware utilization
Æ Supports fast copy in external memory for Mt. rainier specification.
ı Supports padding with pattern or data of memory.
˜ Supports shared memory interface.
9) WSC I/F Features
ΠNRZI Data Detection
´ S&H Signal Generation
ˇ RF I/V Chip Gain Control
¨ Shift Register Block
ˆ LTM (LD Test Mode)
Ø Control Block
10) ARM7TDMI Features
ΠBuilt-in 16KB SRAM for stack, data, or code storage
´ Built-in 4KB ROM for booting and special uses
ˇ Integrated external static memory controller (SRAM/Flash/Flash(ROM), three chip selects)
¨ Six-channel 16bit timers
ˆ One-channel 8bit basic timer and 3bit watchdog timer
Ø One-channel UART
∏ 22-input interrupt (IRQ) controller (1 external inputs)
" 4-input fast interrupt (FIQ) controller (4 sources from IRQ)
' Low-power clock modes (IDLE and SLEEP modes) support
˝ Supports 33.8688MHz, 67.7376MHz (selectable by the MCU).
Ô peripheral registers can be accessed in a single cycle.
 ETM7 embedded
Samsung Electronics
Circuit Operating Descriptions
13-23