AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 145

• 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

Table 105. Status in Slave Transmitter Mode (Continued)
7663D–8051–10/08
(SSCS)
Status
Code
C0h
C8h
Status of the 2-wire bus and
been transmitted (AA=0); ACK
Data byte in SSDAT has been
Last data byte in SSDAT has
transmitted; NOT ACK has
has been received
2-wire hardware
been received
Table 106.
(SSCS)
Status
Code
F8h
00h
No SSDAT action or
No SSDAT action or
No SSDAT action or
No SSDAT action or
No SSDAT action or
No SSDAT action or
No SSDAT action
No SSDAT action
To/from SSDAT
Status of the 2-wire
Bus error due to an
No relevant state
bus and 2-wire
Application Software Response
illegal START or
STOP condition
available; SI= 0
Miscellaneous Status
hardware
information
STA
0
0
1
1
0
0
1
1
No SSDAT
No SSDAT
To SSCON
STO
Application Software Response
To/from
SSDAT
action
action
0
0
0
0
0
0
0
0
SI
0
0
0
0
0
0
0
0
STA STO
AA
0
0
1
0
1
0
1
0
1
No SSCON action
To SSCON
Next Action Taken By 2-wire Software
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
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
1
SI
0
AA
X
Next Action Taken By 2-wire
Software
Wait or proceed current transfer
Only the internal hardware is
affected, no STOP condition is
sent on the bus. In all cases,
the bus is released and STO is
reset.
AT89C51RE2
145