AT89C51RE2 Atmel Corporation, AT89C51RE2 Datasheet - Page 147

• 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

7663D–8051–10/08
Table 109. SSCS (094h) read - Synchronous Serial Control and Status Register
Table 110. SSCS Register: Read Mode - Reset Value = F8h
Table 111. SSADR (096h) - Synchronus Serial Address Register (read/write)
Table 112. SSADR Register - Reset value = FEh
Number
Number
Number
SC4
Bit
Bit
Bit
A7
1
0
7
0
1
2
3
4
5
6
7
7
7
6
5
4
3
2
1
Mnemonic Description
Mnemonic Description
Mnemonic Description
SD1
SD0
SC3
SC0
SC1
SC2
SC3
SC4
Bit
Bit
Bit
A6
A7
A6
A5
A4
A3
A2
A1
6
0
0
0
6
Address bit 1 or Data bit 1.
Address bit 0 (R/W) or Data bit 0.
Always zero
Always zero
Always zero
Status Code bit 0
See to Table 106.
Status Code bit 1
See to Table 106.
Status Code bit 2
See to Table 106.
Status Code bit 3
See to Table 106.
Status Code bit 4
See to Table 106.
Slave Address bit 7
Slave Address bit 6
Slave Address bit 5
Slave Address bit 4
Slave Address bit 3
Slave Address bit 2
Slave Address bit 1
SC2
A5
5
5
SC1
A4
4
4
SC0
A3
3
3
A2
2
0
2
AT89C51RE2
A1
1
0
1
A0
0
0
0
147