Copyright Cirrus Logic, Inc. 2011 (All Rights Reserved) DS508F2 EP7312 High-Performance, Low-Power S" />
參數(shù)資料
型號： EP7312-IVZ
廠商： Cirrus Logic Inc
文件頁數(shù)： 2/54頁
文件大?。?/td> 0K
描述： IC ARM720T MCU 90/74MHZ 208-LQFP
標(biāo)準(zhǔn)包裝： 36
系列： EP7
核心處理器： ARM7
芯體尺寸： 32-位
速度： 74MHz
連通性： 編解碼器，DAI，EBI/EMI，IrDA，鍵盤，SPI/Microwire1，UART/USART
外圍設(shè)備： LCD，LED，MaverickKey，PWM
輸入/輸出數(shù)： 27
程序存儲器類型： ROMless
RAM 容量： 56K x 8
電壓 - 電源 (Vcc/Vdd)： 2.3 V ~ 2.7 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 208-LQFP
包裝： 托盤
配用： 598-1209-ND - KIT DEVELOPMENT EP73XX ARM7
其它名稱： 598-1135
10
Copyright Cirrus Logic, Inc. 2011
(All Rights Reserved)
DS508F2
EP7312
High-Performance, Low-Power System on Chip
DC-to-DC Converter Interface (PWM)
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
Table 14 shows the DC-to-DC Converter Interface pin
assignments.
Timers
Internal (RTC) timer
Two internal 16-bit programmable hardware count-down
timers
General Purpose Input/Output (GPIO)
Three 8-bit and one 3-bit GPIO ports
Supports scanning keyboard matrix
Table 15 shows the GPIO pin assignments.
Note:
Pins are multiplexed. See Table 19 on page 11 for
more information.
Hardware Debug Interface
Full JTAG boundary scan and Embedded ICE support
shows
the
Hardware
Debug
Interface
pin
assignments.
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. Table 17 shows the LED
Flasher pin assignments.
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:
Pins are multiplexed. See Table 19 on page 11 for
more information.
Internal Boot ROM
The internal 128-byte Boot ROM facilitates download of saved
code to the on-board SRAM/FLASH.
Packaging
The EP7312 is available in a 208-pin LQFP package, 256-ball
PBGA package, or a 204-ball TFBGA package.
Table 14. DC-to-DC Converter Interface Pin Assignments
Pin Mnemonic
I/O
Pin Description
DRIVE[1:0]
I/O
PWM drive output
FB[1:0]
I
PWM feedback input
Table 15. General Purpose Input/Output Pin Assignments
Pin Mnemonic
I/O
Pin Description
PA[7:0]
I/O
GPIO port A
PB[7:0]
I/O
GPIO port B
PD[0]/LEDFLSH
(Note)
I/O
GPIO port D
PD[5:1]
I/O
GPIO port D
PD[7:6]/SDQM[1:0]
(Note)
I/O
GPIO port D
PE[1:0]/BOOTSEL[1:0] (Note)
I/O
GPIO port E
PE[2]/CLKSEL
(Note)
I/O
GPIO port E
Table 16. Hardware Debug Interface Pin Assignments
Pin Mnemonic
I/O
Pin Description
TCLK
I
JTAG clock
TDI
I
JTAG data input
TDO
O
JTAG data output
nTRST
I
JTAG async reset input
TMS
I
JTAG mode select
Table 17. LED Flasher Pin Assignments
Pin Mnemonic
I/O
Pin Description
PD[0]/LEDFLSH
(Note)
O
LED flasher driver
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