EP7309-CR Cirrus Logic Inc, EP7309-CR Datasheet - Page 6

• Manufacturer Part Number: EP7309-CR
• Description: 32-Bit Microcontroller IC
• Manufacturer: Cirrus Logic Inc

Specifications of EP7309-CR

• Controller Family/series: (ARM7)
• Core Size: 32 Bit
• No. Of Timers 8/12/16/32 Bits: 0 / 0 / 2 / 0
• Interface: SSI, UART
• Embedded Interface Type: SSI, UART
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

EP7309
High-Performance, Low-Power System on Chip
• Driven byan external 32.768 kHz crystal oscillator
PLL and Clocking
• Processor and Peripheral Clocks operate from a single
• Programmable clock speeds allow the peripheral bus
DC-to-DC converter interface (PWM)
• Provides two 96 kHz clock outputs with
Timers
• Internal (RTC) timer
• Two internal 16-bit programmable hardware count-
General Purpose Input/Output (GPIO)
• Three 8-bit and one 3-bit GPIO ports
• Supports scanning keyboard matrix
6
DRIVE[1:0]
FB[1:0]
MOSCIN
MOSCOUT
VDDOSC
VSSOSC
3.6864 MHz crystal or external 13 MHz clock
to run at 18 MHz when the processor is set to 18 MHz
and at 36 MHz when the processor is set to 36, 49 or
74 MHz
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
down timers
RTCIN
RTCOUT
VDDRTC
VSSRTC
Pin Mnemonic
Table M. DC-to-DC Converter Interface Pin Assignments
Pin Mnemonic
Pin Mnemonic
Table L. PLL and Clocking Pin Assignments
Table K. Real-Time Clock Pin Assignments
Main Oscillator Output
Main Oscillator Power
Main Oscillator Ground
Main Oscillator Input
Real-Time Clock Oscillator Input
Real-Time Clock Oscillator Output
Real-Time Clock Oscillator Power
Real-Time Clock Oscillator Ground
I/O
I/O
I
PWM drive output
PWM feedback input
Pin Description
Pin Description

Copyright 2001 Cirrus Logic (All Rights Reserved)
Pin Description
Hardware debug Interface
• Full JTAG boundary scan and Embedded ICE
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.
• 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
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
TCLK
TDI
TDO
nTRST
TMS
PD[0]/LEDFLSH
Note:
support
Note:
Pin Mnemonic
Table N. General Purpose Input/Output Pin Assignments
Pin Mnemonic
Table O. Hardware Debug Interface Pin Assignments
Pin Mnemonic
Pins are multiplexed. See
information.
Pins are multiplexed. See
information.
Table P. LED Flasher Pin Assignments
(Note)
(Note)
(Note)
(Note)
I/O
O
I
I
I
I
I/O
I/O
O
I/O
I/O
I/O
I
I
I
I
Table R on page 7
Table R on page 7
JTAG clock
JTAG data input
JTAG data output
JTAG async reset input
JTAG mode select
LED flasher driver
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
Pin Description
for more
for more
DS507PP1
