AT89C51RE2-SLRUM Atmel, AT89C51RE2-SLRUM Datasheet - Page 130

• Manufacturer Part Number: AT89C51RE2-SLRUM
• Description: MCU 8051 128K FLASH 44-PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51RE2-SLRUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 34
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-PLCC
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 8 KB
• Interface Type: UART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 34
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: AT89OCD-01
• For Use With: AT89STK-11 - KIT STARTER FOR AT89C51RX2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

130
AT89C51RE2
Table 97. KBLS Register
KBLS-Keyboard Level Selector Register (9Ch)
Reset Value= 0000 0000b
Bit Number
KBLS7
7
7
6
5
4
3
2
1
0
Mnemonic
KBLS6
KBLS7
KBLS6
KBLS5
KBLS4
KBLS3
KBLS2
KBLS1
KBLS0
Bit
6
Description
Keyboard line 7 Level Selection bit
Cleared to enable a low level detection on Port line 7.
Set to enable a high level detection on Port line 7.
Keyboard line 6 Level Selection bit
Cleared to enable a low level detection on Port line 6.
Set to enable a high level detection on Port line 6.
Keyboard line 5 Level Selection bit
Cleared to enable a low level detection on Port line 5.
Set to enable a high level detection on Port line 5.
Keyboard line 4 Level Selection bit
Cleared to enable a low level detection on Port line 4.
Set to enable a high level detection on Port line 4.
Keyboard line 3 Level Selection bit
Cleared to enable a low level detection on Port line 3.
Set to enable a high level detection on Port line 3.
Keyboard line 2 Level Selection bit
Cleared to enable a low level detection on Port line 2.
Set to enable a high level detection on Port line 2.
Keyboard line 1 Level Selection bit
Cleared to enable a low level detection on Port line 1.
Set to enable a high level detection on Port line 1.
Keyboard line 0 Level Selection bit
Cleared to enable a low level detection on Port line 0.
Set to enable a high level detection on Port line 0.
KBLS5
5
KBLS4
4
KBLS3
3
KBLS2
2
KBLS1
1
7663E–8051–10/08
KBLS0
0