參數(shù)資料
型號: 935262922551
廠商: NXP SEMICONDUCTORS
元件分類: 消費家電
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP160
封裝: PLASTIC, SOT-322, QFP-160
文件頁數(shù): 5/147頁
文件大小: 526K
代理商: 935262922551
1998 Apr 09
102
Philips Semiconductors
Product specication
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
7.15.4
FUNCTIONAL DESCRIPTION
An immediate access cycle consists of one address phase and one data phase. A block transfer with address increment
enabled consists of several consecutive address/data phase couples. A block transfer with disabled address increment
consists of one address phase followed by several data phases. The AS_ALE signal toggles only for a new address
phase.The single bytes or words are assembled/disassembled to/from Dwords. This includes byte lane swapping since
8-bit devices use for data transfer AD7 to AD0 only, (AD15 to AD8 are used in address phase too, since all 16 AD lines
are used for addressing.)
Fig.30 DEBI interface.
handbook, full pagewidth
DATA MUX AND CYCLE CONTROL
TRANSFER CONTROL AND DATA ASSEMBLING/DISASSEMBLING
DEBI
FIFO
AS_ALE
LDS_RDN
UDS_WRN
DTACK_RDY
RWN_SBHE
GPIO3
(XIRQ)
AD16 (15 to 0)
multiplexed
adress/data lines
16/8-bit
slave
target bus control signals
Motorola style
Intel style
DEBI_CONFIG
command words
DEBI_AD
DMA address
block length
status
32
DEBI_COMMAND
MHB062
SAA7146A
32
immed.
data
32
8
32
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