AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 141

• Manufacturer Part Number: AT89C51RE2
• Manufacturer: Atmel Corporation

Specifications of AT89C51RE2

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 34
• Spi: 1
• Uart: 2
• Sram (kbytes): 8.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART/OCD
• Watchdog: Yes

Figure 54. Format and State in the Slave Receiver Mode
7663D–8051–10/08
Reception of the own
slave address and one or
more data bytes. All are
acknowledged.
Last data byte received
is not acknowledged.
Arbitration lost as master
and addressed as slave
Reception of the general call
address and one or more data
bytes.
Last data byte received is
not acknowledged.
Arbitration lost as master and
addressed as slave by general call
From master to slave
From slave to master
S
General Call
SLA
Data
n
W
A
70h
78h
60h
68h
A
A
A
A
Any number of data bytes and their associated
acknowledge bits
This number (contained in SSCS) corresponds
to a defined state of the 2-wire bus
Data
Data
80h
90h
A
A
Data
Data
AT89C51RE2
80h
90h
88h
98h
A
A
A
A
P or S
P or S
P or S
P or S
A0h
A0h
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