EP7312-IB Cirrus Logic Inc, EP7312-IB Datasheet - Page 7
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EP7312-IB
Manufacturer Part Number
EP7312-IB
Description
IC ARM720T MCU 74MHZ 256-PBGA
Manufacturer
Cirrus Logic Inc
Series
EP7r
Datasheet
1.EP7312-CVZ.pdf
(64 pages)
Specifications of EP7312-IB
Core Processor
ARM7
Core Size
32-Bit
Speed
74MHz
Connectivity
Codec, DAI, EBI/EMI, IrDA, Keypad, SPI/Microwire1, UART/USART
Peripherals
LCD, LED, MaverickKey, PWM
Number Of I /o
27
Program Memory Type
ROMless
Ram Size
56K x 8
Voltage - Supply (vcc/vdd)
2.3 V ~ 2.7 V
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
256-BGA
For Use With
598-1209 - KIT DEVELOPMENT EP73XX ARM7
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
Other names
598-1240
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP7312-IBZ
Manufacturer:
CIRRUS
Quantity:
13
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, the EP7312 supports self-refresh SDRAMs,
which are placed in a low-power state by the device when it
enters the low-power Standby State.
SDRAM Interface pin assignments.
Digital Audio Capability
The EP7312 uses its powerful 32-bit RISC processing engine
to implement audio decompression algorithms in software. The
nature of the on-board RISC processor, and the availability of
efficient C-compilers and other software development tools,
ensures that a wide range of audio decompression algorithms
can easily be ported to and run on the EP7312
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
DS508F1
SDCLK
SDCKE
nSDCS[1:0]
WRITE/nSDRAS
nMOE/nSDCAS
nMWE/nSDWE
A[27:15]/DRA[0:12]
A[14:13]/DRA[12:14]
PD[7:6]/SDQM[1:0]
SDQM[3:2]
D[31:0]
Note:
Pin Mnemonic
1. Pins A[27:13] map to DRA[0:14] respectively.
balance the load for large memory systems.
2. Pins are multiplexed. See
Table 3. SDRAM Interface Pin Assignments
(i.e. A[27}/DRA[0}, A[26}/DRA[1], etc.) This is to
more information.
(Note 2)
(Note 2)
(Note 1)
(Note 2)
(Note 2)
I/O
I/O
I/O
O
O
O
O
O
O
O
O
O
Table 19 on page 11
SDRAM clock output
SDRAM clock enable output
SDRAM chip select out
SDRAM RAS signal output
SDRAM CAS control signal
SDRAM write enable control
signal
SDRAM address
SDRAM internal bank select
SDRAM byte lane mask
SDRAM byte lane mask
Data I/O
Pin Description
Table 3
©
Copyright Cirrus Logic, Inc. 2005
shows the
(All Rights Reserved)
for
communication interface directly.
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
Crystal
feature digital bass and treble boost, digital volume control and
compressor-limiter functions.
pin assignments.
TXD[1]
RXD[1]
CTS
DCD
DSR
TXD[2]
RXD[2]
LEDDRV
PHDIN
SCLK
SDOUT
SDIN
LRCK
MCLKIN
MCLKOUT
Table 4. Universal Asynchronous Receiver/Transmitters Pin
Note:
Pin Mnemonic
Pin Mnemonic
‚
CS53L32 low-power ADC. Some of these devices
See
multiplexes.
‚
High-Performance, Low-Power System on Chip
CS43L41/42/43 low-power audio DACs and the
Table 5. DAI Interface Pin Assignments
Table 18 on page 11
Assignments
I/O
O
O
O
I
I
I
I
I
I
Table 5
I/O
O
O
O
O
I
I
for information on pin
Table 4
UART 1 transmit
UART 1 receive
UART 1 clear to send
UART 1 data carrier detect
UART 1 data set ready
UART 2 transmit
UART 2 receive
Infrared LED drive output
Photo diode input
Serial bit clock
Serial data out
Serial data in
Sample clock
Master clock input
Master clock output
shows the DAI Interface
Pin Description
Pin Description
shows the UART pin
EP7312
7