AT89C51ID2 Atmel Corporation, AT89C51ID2 Datasheet - Page 91

• Manufacturer Part Number: AT89C51ID2
• Manufacturer: Atmel Corporation

Specifications of AT89C51ID2

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Sram (kbytes): 2
• Eeprom (bytes): 2048
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Isp: UART
• Watchdog: Yes

Table 68. Status in Slave Receiver Mode
91
(SSCS)
Status
Code
60h
68h
70h
78h
80h
88h
90h
AT89C51ID2
Status of the 2-wire bus and
Arbitration lost in SLA+R/W as
master; own SLA+W has been
General call address has been
Arbitration lost in SLA+R/W as
received; NOT ACK has been
has been received; ACK has
master; general call address
own SLA+W; data has been
own SLA+W; data has been
general call; data has been
Previously addressed with
Previously addressed with
Previously addressed with
received; ACK has been
received; ACK has been
received; ACK has been
received; ACK has been
received; ACK has been
Own SLA+W has been
2-wire hardware
been returned
returned
returned
returned
returned
returned
returned
No SSDAT action or
No SSDAT action or
No SSDAT action or
No SSDAT action or
No SSDAT action or
Read data byte or
Read data byte or
Read data byte or
Read data byte or
No SSDAT action
No SSDAT action
No SSDAT action
No SSDAT action
No SSDAT action
To/from SSDAT
Read data byte
Read data byte
Application Software Response
STA
X
X
X
X
X
X
X
X
X
X
0
0
1
1
X
X
To SSCON
STO
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SI
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
AA
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Next Action Taken By 2-wire Software
Data byte will be received and NOT ACK will be
returned
Data byte will be received and ACK will be
returned
Data byte will be received and NOT ACK will be
returned
Data byte will be received and ACK will be
returned
Data byte will be received and NOT ACK will be
returned
Data byte will be received and ACK will be
returned
Data byte will be received and NOT ACK will be
returned
Data byte will be received and ACK will be
returned
Data byte will be received and NOT ACK will be
returned
Data byte will be received and ACK will be
returned
Switched to the not addressed slave mode; no
recognition of own SLA or GCA
Switched to the not addressed slave mode; own
SLA will be recognised; GCA will be recognised if
GC=logic 1
Switched to the not addressed slave mode; no
recognition of own SLA or GCA. A START
condition will be transmitted when the bus
becomes free
Switched to the not addressed slave mode; own
SLA will be recognised; GCA will be recognised if
GC=logic 1. A START condition will be
transmitted when the bus becomes free
Data byte will be received and NOT ACK will be
returned
Data byte will be received and ACK will be
returned
4289C–8051–11/05