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ATMEGA640 bảng dữ liệu(PDF) 264 Page - Microchip Technology

tên linh kiện ATMEGA640
Giải thích chi tiết về linh kiện  8-bit Microcontroller with 16/32/64KB In-System Programmable Flash
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ATMEGA640 bảng dữ liệu(HTML) 264 Page - Microchip Technology

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]
DS40002211A
24.9.6
TWAMR – TWI (Slave) Address Mask Register
• Bits 7:1 – TWAM: TWI Address Mask
The TWAMR can be loaded with a 7-bit Slave Address mask. Each of the bits in TWAMR can mask (disable) the
corresponding address bit in the TWI Address Register (TWAR). If the mask bit is set to one then the address
match logic ignores the compare between the incoming address bit and the corresponding bit in TWAR. Figure 24-
22 shows the address match logic in detail.
Figure 24-22. TWI Address Match Logic, Block Diagram
• Bit 0 – Res: Reserved Bit
This bit is reserved and will always read as zero.
Bit
76543210
(0xBD)
TWAM[6:0]
–
TWAMR
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
Initial Value
00000000
Address
Match
Address Bit Comparator 0
Address Bit Comparator 6..1
TWAR0
TWAMR0
Address
Bit 0



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