參數(shù)資料
型號: AT91SAM7S32B-MU
廠商: Atmel
文件頁數(shù): 17/165頁
文件大?。?/td> 0K
描述: IC MCU ARM7 32KB FLASH 48-VQFN
產(chǎn)品培訓模塊: MCU Product Line Introduction
標準包裝: 250
系列: SAM7S
核心處理器: ARM7
芯體尺寸: 16/32-位
速度: 55MHz
連通性: I²C,SPI,SSC,UART/USART
外圍設備: 欠壓檢測/復位,DMA,POR,PWM,WDT
輸入/輸出數(shù): 21
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 1.65 V ~ 1.95 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: 48-VFQFN 裸露焊盤
包裝: 托盤
配用: AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9
AT91SAM7S-EK-ND - KIT EVAL FOR ARM AT91SAM7S
113
SAM7S Series [DATASHEET]
6175M–ATARM–26-Oct-12
When the bit is set, the bit FRDY in the Flash Programming Status Register (MC_FSR) rises. If an interrupt has
been enabled by setting the bit FRDY in MC_FMR, the interrupt line of the Memory Controller is activated.
Two errors can be detected in the MC_FSR register after a programming sequence:
Programming Error: A bad keyword and/or an invalid command have been written in the MC_FCR register
If the general-purpose bit number is greater than the total number of general-purpose bits, then the command
has no effect.
It is possible to deactivate a general-purpose NVM bit set previously. The clear sequence is:
Start the Clear General-purpose Bit command (CGPB) by writing the Flash Command Register with CGPB and
the number of the general-purpose bit to be cleared in the PAGEN field.
When the clear completes, the bit FRDY in the Flash Programming Status Register (MC_FSR) rises. If an
interrupt has been enabled by setting the bit FRDY in MC_FMR, the interrupt line of the Memory Controller is
activated.
Two errors can be detected in the MC_FSR register after a programming sequence:
Programming Error: a bad keyword and/or an invalid command have been written in the MC_FCR register
If the number of the general-purpose bit set in the PAGEN field is greater than the total number of general-
purpose bits, then the command has no effect.
The Clear General-purpose Bit command programs the general-purpose NVM bit to 0; the corresponding bit
GPNVM0 to GPNVMx in MC_FSR reads 0. The Set General-purpose Bit command programs the general-purpose
NVM bit to 1; the corresponding bit GPNVMx in MC_FSR reads 1.
Note:
Access to the Flash in read mode is permitted when a Set, Clear or Get General-purpose NVM Bit command is
performed.
19.2.4.5
Security Bit
The goal of the security bit is to prevent external access to the internal bus system. (Does not apply to EFC1 on
theSAM7S512.) JTAG, Fast Flash Programming and Flash Serial Test Interface features are disabled. Once set,
this bit can be reset only by an external hardware ERASE request to the chip. Refer to the product definition sec-
tion for the pin name that controls the ERASE. In this case, the full memory plane is erased and all lock and
general-purpose NVM bits are cleared. The security bit in the MC_FSR is cleared only after these operations. The
activation sequence is:
Start the Set Security Bit command (SSB) by writing the Flash Command Register.
When the locking completes, the bit FRDY in the Flash Programming Status Register (MC_FSR) rises. If an
interrupt has been enabled by setting the bit FRDY in MC_FMR, the interrupt line of the Memory Controller is
activated.
When the security bit is active, the SECURITY bit in the MC_FSR is set.
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