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| 型號(hào)： | EP7312-EB-90 |
| 廠商： | Cirrus Logic, Inc. |
| 英文描述： | HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| 中文描述： | 高性能，低功耗的片上系統(tǒng)的SDRAM和增強(qiáng)數(shù)字音頻接口 |
| 文件頁數(shù)： | 7/64頁 |
| 文件大小： | 1710K |
| 代理商： | EP7312-EB-90 |
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DS508PP5
Copyright Cirrus Logic, Inc. 2003
(All Rights Reserved)
7
EP7312
High-Performance, Low-Power System on Chip
The second is the programmable 16- or 32-bit-wide
SDRAM interface that allows direct connection of up to
two banks of SDRAM, totaling 512 Mb. To assure the
lowest
possible
power
consumption,
supports self-refresh SDRAMs, which are placed in a
low-power state by the device when it enters the low-
power Standby State.
Table 3
shows the SDRAM
Interface pin assignments.
the
EP7312
Note:
1. Pins A[27:13] map to DRA[0:14] respectively.
(i.e. A[27}/DRA[0}, A[26}/DRA[1], etc.) This is to
balance the load for large memory systems.
2. Pins are multiplexed. See
Table 19 on page 11
for
more information.
Digital Audio Capability
The EP7312 uses its powerful 32-bit RISC processing
engine to implement audio decompression algorithms in
software. Thenatureof theon-board RISC processor, and
the availability
of efficient C-compilers and
softwaredevelopment tools, ensures that a widerangeof
audio decompression algorithms can easily be ported to
and run on theEP7312
other
Universal Asynchronous
Receiver/Transmitters (UARTs)
The EP7312 includes two 16550-type UARTs for RS-232
serial communications, both of which have two 16-byte
FIFOs for receiving and transmitting data. The UARTs
support bit rates up to 115.2 kbps. An IrDA SIR protocol
encoder/ decoder can be optionally switched into the
RX/ TX signals to/ from UART 1 to enable these signals
to drive an infrared communication interface directly.
Table 4
shows the UART pin assignments.
Digital Audio Interface (DAI)
The EP7312 integrates an interface to enable a direct
connection to many low cost, low power, high quality
audio converters. In particular, the DAI can directly
interface with the Crystal
CS43L41/ 42/ 43 low-power
audio DACs and the Crystal
CS53L32 low-power ADC.
Some of these devices feature digital bass and treble
boost, digital volume control and compressor-limiter
functions.
Table
5
shows
assignments.
the
DAI
Interface pin
Note:
See
Table 18 on page 11
for information on pin
multiplexes.
Table 3. SDRAM Interface Pin Assignments
Pin Mnemonic
I/O
Pin Description
SDCLK
O
SDRAM clock output
SDCKE
O
SDRAM clock enable output
nSDCS[1:0]
O
SDRAM chip select out
WRITE/nSDRAS
(Note 2)
O
SDRAM RAS signal output
nMOE/nSDCAS
(Note 2)
O
SDRAM CAS control signal
nMWE/nSDWE
(Note 2)
O
SDRAM write enable control
signal
A[27:15]/DRA[0:12]
(Note 1)
O
SDRAM address
A[14:13]/DRA[12:14]
O
SDRAM internal bank select
PD[7:6]/SDQM[1:0]
(Note 2)
I/O
SDRAM byte lane mask
SDQM[3:2]
O
SDRAM byte lane mask
D[31:0]
I/O
Data I/O
Table 4. Universal Asynchronous Receiver/Transmitters Pin
Assignments
Pin Mnemonic
I/O
Pin Description
TXD[1]
O
UART 1 transmit
RXD[1]
I
UART 1 receive
CTS
I
UART 1 clear to send
DCD
I
UART 1 data carrier detect
DSR
I
UART 1 data set ready
TXD[2]
O
UART 2 transmit
RXD[2]
I
UART 2 receive
LEDDRV
O
Infrared LED drive output
PHDIN
I
Photo diode input
Table 5. DAI Interface Pin Assignments
Pin Mnemonic
I/O
Pin Description
SCLK
O
Serial bit clock
SDOUT
O
Serial data out
SDIN
I
Serial data in
LRCK
O
Sample clock
MCLKIN
I
Master clock input
MCLKOUT
O
Master clock output
相關(guān)PDF資料 |
PDF描述 |
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| EP7312-EB-C | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-ER-C | HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-IR-C | GT 3C 3#16S PIN PLUG |
| EP7312-CR-90 | HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-ER-90 | HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| EP7312-EB-C | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-ER-90 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-ER-C | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-EV-90 | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM ON CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
| EP7312-EV-C | 制造商:CIRRUS 制造商全稱:Cirrus Logic 功能描述:HIGH-PERFORMANCE, LOW-POWER SYSTEM-ON-CHIP WITH SDRAM AND ENHANCED DIGITAL AUDIO INTERFACE |
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