ep7311 Cirrus Logic, Inc., ep7311 Datasheet - Page 10
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ep7311
Manufacturer Part Number
ep7311
Description
Ep7311 Data Sheet
Manufacturer
Cirrus Logic, Inc.
Datasheet
1.EP7311.pdf
(58 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ep7311-CB-90
Manufacturer:
Cirrus Logic Inc
Quantity:
10 000
Company:
Part Number:
ep7311-CV-90
Manufacturer:
Cirrus Logic Inc
Quantity:
10 000
EP7311
High-Performance, Low-Power System on Chip
DC-to-DC converter interface (PWM)
•
Timers
•
•
General Purpose Input/Output (GPIO)
•
•
10
DRIVE[1:0]
FB[1:0]
PA[7:0]
PB[7:0]
PD[0]/LEDFLSH
PD[5:1]
PD[7:6]/SDQM[1:0]
PE[1:0]/BOOTSEL[1:0] (Note)
PE[2]/CLKSEL
Provides two 96 kHz clock outputs with programmable
duty ratio (from 1-in-16 to 15-in-16) that can be used to
drive a positive or negative DC to DC converter
Internal (RTC) timer
Two internal 16-bit programmable hardware count-down
timers
Three 8-bit and one 3-bit GPIO ports
Supports scanning keyboard matrix
Note:
Pin Mnemonic
Table O. General Purpose Input/Output Pin Assignments
Table N. DC-to-DC Converter Interface Pin Assignments
Pin Mnemonic
Pins are multiplexed. See
information.
(Note)
(Note)
(Note)
I/O
I/O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
Table S on page 11
PWM drive output
PWM feedback input
GPIO port A
GPIO port B
GPIO port D
GPIO port D
GPIO port D
GPIO port E
GPIO port E
Pin Description
Pin Description
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Copyright Cirrus Logic, Inc. 2005
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(All Rights Reserved)
Hardware debug Interface
•
LED Flasher
A dedicated LED flasher module can be used to generate a low
frequency signal on Port D pin 0 for the purpose of blinking an
LED without CPU intervention. The LED flasher feature is
ideal as a visual annunciator in battery powered applications,
such as a voice mail indicator on a portable phone or an
appointment reminder on a PDA.
•
•
•
•
Internal Boot ROM
The internal 128 byte Boot ROM facilitates download of saved
code to the on-board SRAM/FLASH.
Packaging
The EP7311 is available in a 208-pin LQFP package, 256-ball
PBGA package or a 204-ball TFBGA package.
TCLK
TDI
TDO
nTRST
TMS
PD[0]/LEDFLSH
Full JTAG boundary scan and Embedded ICE
Software adjustable flash period and duty cycle
Operates from 32 kHz RTC clock
Will continue to flash in IDLE and STANDBY states
4 mA drive current
Note:
Pin Mnemonic
Table P. Hardware Debug Interface Pin Assignments
Pin Mnemonic
Pins are multiplexed. See
information.
Table Q. LED Flasher Pin Assignments
(Note)
I/O
O
I
I
I
I
I/O
O
Table S on page 11
JTAG clock
JTAG data input
JTAG data output
JTAG async reset input
JTAG mode select
LED flasher driver
Pin Description
Pin Description
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