AT89C51ED2-SMSUM Atmel, AT89C51ED2-SMSUM Datasheet - Page 78

• Manufacturer Part Number: AT89C51ED2-SMSUM
• Description: IC 8051 MCU FLASH 64K 68PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51ED2-SMSUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 60MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 68-PLCC
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: EUART, SPI
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 3 bit
• 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 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

78
AT89C51RD2/ED2
Table 17-7.
IPL1 - Interrupt Priority Register (B2h)
Reset Value = XXXX X000b
Bit addressable
Number
Bit
7
7
6
5
4
3
2
1
0
-
Mnemonic
IPL1 Register
KBDL
SPIL
Bit
6
-
-
-
-
-
-
-
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
SPI interrupt Priority bit
Refer to SPIH for priority level.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Keyboard interrupt Priority bit
Refer to KBDH for priority level.
5
-
4
-
3
-
SPIL
2
TWIL
1
4235K–8051–05/08
KBDL
0