AT89C51RC2-RLTUL Atmel, AT89C51RC2-RLTUL Datasheet - Page 66

• Manufacturer Part Number: AT89C51RC2-RLTUL
• Description: IC 8051 MCU FLASH 32K 44VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RC2-RLTUL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• 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
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• For Use With: AT89OCD-01 - USB EMULATOR FOR AT8XC51 MCUAT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

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AT89C51RB2/RC2
Table 52. KBE Register
KBE - Keyboard Input Enable Register (9Dh)
Reset Value = 0000 0000b
Number
KBE7
Bit
7
7
6
5
4
3
2
1
0
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
4180E–8051–10/06
KBE0
0