参数资料
型号: CS4210VJG
厂商: NATIONAL SEMICONDUCTOR CORP
元件分类: 微控制器/微处理器
英文描述: IEEE 1394 OHCI Controller
中文描述: 1 CHANNEL(S), 400M bps, SERIAL COMM CONTROLLER, PQFP100
封装: LQFP-100
文件页数: 6/102页
文件大小: 1571K
代理商: CS4210VJG
www.national.com
6
Revision 1.0
G
1.0
The CS4210 device implements an IEEE 1394 serial bus
host controller as specified by the OHCI Specification Ver-
sion 1.0. It is organized as a collection of reusable modules
as illustrated in Figure 1-1.
Architectural Description
The interface to the 1394 bus is organized into three clock
domains: PCI, SCLK, and SCLK/2. The PCI clock domain
can operate at up to 33 MHz. The PCI clock can also be
stopped. The SCLK clock domain operates at 49.152 MHz.
The SCLK/2 clock domain operates at 24.576 MHz.
1.1
The PCI interface module provides a full function bus mas-
tering interface to the PCI bus.
PCI INTERFACE MODULE
1.2
The DMA engine is decomposed into four functional mod-
ules:
DMA ENGINE
TE: Transfer Engine
— Provides generic data movement services to the rest
of the DMA engine logic.
ATDMA: Asynchronous Transmit DMA
— Controls the transmission of all asynchronous
packets.
ITDMA: Isochronous Transmit DMA
— Controls the transmission of all isochronous packets.
RDMA: Receive DMA
— Processes all received packets (asynchronous,
isochronous and physical) and transmit status.
A single port SRAM is shared by the DMA logic for caching
control information and descriptor blocks fetched from the
host memory. This RAM is used for capturing entire
descriptor blocks in a single PCI bus tenure.
Figure 1-1. Functional Block Diagram
ITDMA
RDMA
Arbiter
FM_Bus (Master)
FM_Bus (Slave)
PCI Interface
Register
Set
Clock Generator
and Power
Management
Tx FIFO
(SRAM)
Scratchpad
(SRAM)
Rx FIFO
(SRAM)
Tx Drain
Rx Fill
Link Layer
Physical Layer Interface (49.152 MHz)
SCLK
LREQ
DATA[0:7]
CTRL[0:1]
DIRECT
DMA Engine
Phys
ATDMA
TE
IR
AR
Tx FIFO
(SRAM)
I
2
C Bus
LNKON LPS
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