參數(shù)資料
型號(hào): ATMEGA169P-16MCHR
廠商: Atmel
文件頁(yè)數(shù): 70/274頁(yè)
文件大?。?/td> 0K
描述: MCU AVR 16KB FLASH 16MHZ 64-VQFN
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
megaAVR Introduction
標(biāo)準(zhǔn)包裝: 4,000
系列: AVR® ATmega
核心處理器: AVR
芯體尺寸: 8-位
速度: 16MHz
連通性: SPI,UART/USART,USI
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,LCD,POR,PWM,WDT
輸入/輸出數(shù): 54
程序存儲(chǔ)器容量: 16KB(8K x 16)
程序存儲(chǔ)器類型: 閃存
EEPROM 大小: 512 x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 64-VQFN 雙排裸露焊盤(pán)
包裝: 帶卷 (TR)
配用: ATSTK600-ND - DEV KIT FOR AVR/AVR32
ATAVRBFLY-ND - KIT EVALUATION AVR BUTTERFLY
ATSTK502-ND - MOD EXPANSION AVR STARTER 500
ATSTK500-ND - PROGRAMMER AVR STARTER KIT
其它名稱: ATMEGA169P-16MCHR SL383
ATMEGA169P-16MCHR-ND
ATMEGA169P-16MCHRTR
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2005 Microchip Technology Inc.
Preliminary
DS41265A-page 159
PIC16F946
13.0
DATA EEPROM AND FLASH
PROGRAM MEMORY
CONTROL
Data EEPROM memory is readable and writable and
the Flash program memory is readable during normal
operation (full VDD range). These memories are not
directly mapped in the register file space. Instead, they
are indirectly addressed through the Special Function
Registers. There are six SFRs used to access these
memories:
EECON1
EECON2
EEDATL
EEDATH
EEADRL
EEADRH
When interfacing the data memory block, EEDATL
holds the 8-bit data for read/write, and EEADRL holds
the address of the EE data location being accessed.
This device has 256 bytes of data EEPROM with an
address range from 0h to 0FFh.
When interfacing the program memory block, the
EEDATL and EEDATH registers form a 2-byte word
that holds the 14-bit data for read, and the EEADRL
and EEADRH registers form a 2-byte word that holds
the 13-bit address of the EEPROM location being
accessed. This device has 4k and 8k words of program
EEPROM with an address range from 0h-0FFFh and
0h-1FFFh. The program memory allows one-word
reads.
The EEPROM data memory allows byte read and write.
A byte write automatically erases the location and
writes the new data (erase before write).
The write time is controlled by an on-chip timer. The
write/erase voltages are generated by an on-chip
charge pump rated to operate over the voltage range of
the device for byte or word operations.
When the device is code-protected, the CPU may
continue to read and write the data EEPROM memory
and read the program memory. When code-protected,
the device programmer can no longer access data or
program memory.
Additional information on the data EEPROM is
available in the “PICmicro Mid-Range MCU Family
Reference Manual” (DS33023).
13.1
EEADRL and EEADRH Registers
The EEADRL and EEADRH registers can address up
to a maximum of 256 bytes of data EEPROM or up to a
maximum of 8k words of program EEPROM.
When selecting a program address value, the MSB of
the address is written to the EEADRH register and the
LSB is written to the EEADRL register. When selecting
a data address value, only the LSB of the address is
written to the EEADRL register.
13.1.1
EECON1 AND EECON2 REGISTERS
EECON1 is the control register for EE memory
accesses.
Control bit EEPGD determines if the access will be a
program or data memory access. When clear, as it is
when reset, any subsequent operations will operate on
the data memory. When set, any subsequent operations
will operate on the program memory. Program memory
can only be read.
Control bits RD and WR initiate read and write,
respectively. These bits cannot be cleared, only set, in
software. They are cleared in hardware at completion
of the read or write operation. The inability to clear the
WR bit in software prevents the accidental, premature
termination of a write operation.
The WREN bit, when set, will allow a write operation to
data EEPROM. On power-up, the WREN bit is clear.
The WRERR bit is set when a write operation is
interrupted by a MCLR or a WDT Time-out Reset
during normal operation. In these situations, following
Reset, the user can check the WRERR bit and rewrite
the location. The data and address will be unchanged
in the EEDATL and EEADRL registers.
Interrupt flag bit EEIF (PIR1<7>), is set when write is
complete. It must be cleared in the software.
EECON2 is not a physical register. Reading EECON2
will read all ‘0’s. The EECON2 register is used
exclusively in the data EEPROM write sequence.
相關(guān)PDF資料
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