AT89C51ID2-RLTUM Atmel, AT89C51ID2-RLTUM Datasheet - Page 119

• Manufacturer Part Number: AT89C51ID2-RLTUM
• Description: IC 8051 MCU FLASH 64K 44VQFP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of AT89C51ID2-RLTUM

• 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: 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: 44-TQFP, 44-VQFP
• Processor Series: AT89x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 2 KB
• Interface Type: UART, SPI, TWI
• 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
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Minimum Operating Temperature: - 40 C
• Package: 44VQFP
• Device Core: 8051
• Family Name: 89C
• Maximum Speed: 40 MHz
• Height: 1.45 mm
• Length: 10.1 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 2.7 V
• Width: 10.1 mm
• 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: Details

119
AT89C51ID2
Table 90. Default Values
After programming the part by ISP, the BSB must be cleared (00h) in order to allow the
application to boot at 0000h.
The content of the Software Security Byte (SSB) is described in Table 90 and Table 93.
To assure code protection from a parallel access, the HSB must also be at the required
level.
Table 91. Software Security Byte
Table 92.
The two lock bits provide different levels of protection for the on-chip code and data,
when programmed as shown to Table 93.
Mnemonic
Number
Bit
SBV
HSB
BSB
SSB
1-0
7
-
7
6
5
4
3
2
Mnemonic Description
Software Boot Vector
Copy of the Hardware security byte
Boot Status Byte
Software Security Byte
Copy of the Manufacturer Code
Copy of the Device ID #1: Family Code
Copy of the Device ID #2: memories size
and type
Copy of the Device ID #3: name and
revision
LB1-0
Bit
6
-
-
-
-
-
-
-
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
Reserved
Do not clear this bit.
User Memory Lock Bits
See Table 93
Definition
5
-
4
-
3
-
Default value
101x 1011b
0FFh
ECh
FCh
FFh
D7h
EFh
58h
2
-
ATMEL
C51 X2, Electrically Erasable
AT89C51ID2 64KB
AT89C51ID2 64KB, Revision
0
LB1
Description
1
4289C–8051–11/05
LB0
0