参数资料
型号: AT90S8515-8PC
厂商: Atmel
文件页数: 96/112页
文件大小: 0K
描述: IC MCU 8K FLSH 8MHZ 40DIP
标准包装: 18
系列: AVR® 90S
核心处理器: AVR
芯体尺寸: 8-位
速度: 8MHz
连通性: SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 32
程序存储器容量: 8KB(4K x 16)
程序存储器类型: 闪存
EEPROM 大小: 512 x 8
RAM 容量: 512 x 8
电压 - 电源 (Vcc/Vdd): 4 V ~ 6 V
振荡器型: 内部
工作温度: 0°C ~ 70°C
封装/外壳: 40-DIP(0.600",15.24mm)
包装: 管件
84
AT90S8515
0841G–09/01
Bit 5 = SPIEN Fuse bit
Bit 0 = FSTRT Fuse bit
Bit 7- 6, 4- 1 = “1”. These bits are reserved and should be left unprogrammed (“1”).
3.
Give WR a t
WLWH_PFB-wide negative pulse to execute the programming,
t
WLWH_PFB is found in Table 30. Programming the Fuse bits does not generate
any activity on the RDY/BSY pin.
Programming the Lock Bits
The algorithm for programming the Lock bits is as follows (refer to “Programming the
Flash” on page 81 for details on command and data loading):
1.
A: Load Command “0010 0000”.
2.
D: Load Data Low Byte. Bit n = “0” programs the Lock bit.
Bit 2 = Lock Bit2
Bit 1 = Lock Bit1
Bit 7 - 3, 0 = “1”. These bits are reserved and should be left unprogrammed (“1”).
3.
E: Write Data Low Byte.
The Lock bits can only be cleared by executing Chip Erase.
Reading the Fuse and Lock
Bits
The algorithm for reading the Fuse and Lock bits is as follows (refer to “Programming
the Flash” on page 81 for details on Command loading):
1.
A: Load Command “0000 0100”.
2.
Set OE to “0”, and BS to “1”. The status of the Fuse and Lock bits can now be
read at DATA (“0” means programmed).
Bit 7 = Lock Bit1
Bit 6 = Lock Bit2
Bit 5 = SPIEN Fuse bit
Bit 0 = FSTRT Fuse bit
3.
Set OE to “1”.
Observe that BS needs to be set to “1”.
Reading the Signature Bytes
The algorithm for reading the signature bytes is as follows (refer to “Programming the
Flash” on page 81 for details on command and address loading):
1.
A: Load Command “0000 1000”.
2.
C: Load Address Low Byte ($00 - $02).
Set OE to “0”, and BS to “0”. The selected signature byte can now be read at DATA.
3.
Set OE to “1”.
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