AT80C51RD2-SLSUM Atmel, AT80C51RD2-SLSUM Datasheet - Page 54

• Manufacturer Part Number: AT80C51RD2-SLSUM
• Description: MCU, 8BIT, 8051, 5V, SPI, 20MHZ, 44PLCC
• Manufacturer: Atmel

Specifications of AT80C51RD2-SLSUM

• Controller Family/series: (8051) 8052
• No. Of I/o's: 32
• Ram Memory Size: 1280Byte
• Cpu Speed: 40MHz
• No. Of Timers: 3
• No. Of Pwm Channels: 5
• Core Size: 8bit
• Oscillator Type: External Only
• Processor Series: AT80x
• Core: 8051
• Data Bus Width: 8 bit
• Program Memory Type: ROMLess
• Data Ram Size: 1280 B
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PLCC
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Cpu Family: AT80
• Device Core: 8051
• Device Core Size: 8b
• Frequency (max): 40MHz
• Program Memory Size: Not Required
• Total Internal Ram Size: 1.25KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

54
AT80C51RD2
Table 13-2.
KBE - Keyboard Input Enable Register (9Dh)
Reset Value = 0000 0000b
Number
KBE7
Bit
7
7
6
5
4
3
2
1
0
KBE Register
Mnemonic Description
KBE6
KBE7
KBE6
KBE5
KBE4
KBE3
KBE2
KBE1
KBE0
Bit
6
Keyboard line 7 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.7 bit in KBF register to generate an interrupt request.
Keyboard line 6 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.6 bit in KBF register to generate an interrupt request.
Keyboard line 5 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.5 bit in KBF register to generate an interrupt request.
Keyboard line 4 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.4 bit in KBF register to generate an interrupt request.
Keyboard line 3 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.3 bit in KBF register to generate an interrupt request.
Keyboard line 2 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.2 bit in KBF register to generate an interrupt request.
Keyboard line 1 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.1 bit in KBF register to generate an interrupt request.
Keyboard line 0 enable bit
Cleared to enable standard I/O pin.
Set to enable KBF.0 bit in KBF register to generate an interrupt request.
KBE5
5
KBE4
4
KBE3
3
KBE2
2
KBE1
1
4113D–8051–01/09
KBE0
0