參數(shù)資料
型號: AT90S4433-8AC
廠商: Atmel
文件頁數(shù): 113/126頁
文件大?。?/td> 0K
描述: IC MCU 4K FLSH 8MHZ A/D 32TQFP
標準包裝: 250
系列: AVR® 90S
核心處理器: AVR
芯體尺寸: 8-位
速度: 8MHz
連通性: SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 20
程序存儲器容量: 4KB(2K x 16)
程序存儲器類型: 閃存
EEPROM 大小: 256 x 8
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 4 V ~ 6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 6x10b
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 32-TQFP
包裝: 托盤
87
AT90S/LS4433
1042H–AVR–04/03
Enter Programming Mode
The following algorithm puts the device in Parallel Programming mode:
1.
Apply supply voltage according to Table 29, between V
CC and GND.
2.
Set the RESET and BS pin to “0” and wait at least 100 ns.
3.
Apply 11.5 - 12.5V to RESET. Any activity on BS within 100 ns after +12V has
been applied to RESET will cause the device to fail entering Programming mode.
Table 30. Pin Name Mapping
Signal Name in
Programming Mode
Pin Name
I/O
Function
RDY/BSY
PD1
O
0: Device is busy programming, 1: Device is
ready for new command
OE
PD2
I
Output Enable (active low)
WR
PD3
I
Write Pulse (active low)
BS
PD4
I
Byte Select (“0” selects Low Byte, “1”
selects High Byte)
XA0
PD5
I
XTAL Action Bit 0
XA1
PD6
I
XTAL Action Bit 1
DATA
PC1 - 0, PB5 - 0
I/O
Bi-directional Data Bus (output when OE is
low)
Table 31. XA1 and XA0 Coding
XA1
XA0
Action when XTAL1 is Pulsed
0
Load Flash or EEPROM Address (high or low address byte determined by BS)
0
1
Load Data (high or low data byte for Flash determined by BS)
1
0
Load Command
1
No Action, Idle
Table 32. Command Byte Bit Coding
Command Byte
Command Executed
1000 0000
Chip Erase
0100 0000
Write Fuse Bits
0010 0000
Write Lock Bits
0001 0000
Write Flash
0001 0001
Write EEPROM
0000 1000
Read Signature Bytes
0000 0100
Read Fuse and Lock Bits
0000 0010
Read Flash
0000 0011
Read EEPROM
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