AT87C51RD2-RDTUM Atmel, AT87C51RD2-RDTUM Datasheet - Page 55

• Manufacturer Part Number: AT87C51RD2-RDTUM
• Description: IC 8051 MCU 32K OTP 40MHZ 64VQFP
• Manufacturer: Atmel
• Series: 87Cr

Specifications of AT87C51RD2-RDTUM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40/20MHz
• Connectivity: UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: OTP
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: UART
• Maximum Clock Frequency: 40 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

9.3.3
9.3.4
4188F–8051–01/08
* See Table 31. for proper value on these inputs
Programming Algorithm
Verify algorithm
PROGRAM SIGNALS*
CONTROL SIGNALS*
Figure 9-1.
The Improved Quick Pulse algorithm is based on the Quick Pulse algorithm and decreases the
number of pulses applied during byte programming from 25 to 1.
To program the TS87C51RB2/RC2/RD2 the following sequence must be exercised:
Repeat step 2 through 6 changing the address and data for the entire array or until the end of
the object file is reached (See
Code array verify must be done after each byte or block of bytes is programmed. In either case,
a complete verify of the programmed array will ensure reliable programming of the
TS87C51RB2/RC2/RD2.
P 2.7 is used to enable data output.
To verify the TS87C51RB2/RC2/RD2 code the following sequence must be exercised:
Repeat step 2 through 3 changing the address for the entire array verification (See Figure 9-2.)
• Step 1: Activate the combination of control signals.
• Step 2: Input the valid address on the address lines.
• Step 3: Input the appropriate data on the data lines.
• Step 4: Raise EA/VPP from VCC to VPP (typical 12.75V).
• Step 5: Pulse ALE/PROG once.
• Step 6: Lower EA/VPP from VPP to VCC
• Step 1: Activate the combination of program and control signals.
• Step 2: Input the valid address on the address lines.
• Step 3: Read data on the data lines.
4 to 6 MHz
Set-Up Modes Configuration
EA/VPP
ALE/PROG
RST
PSEN
P2.6
P2.7
P3.3
P3.6
P3.7
XTAL1
Figure
P2.0-P2.5
P3.4-P3.5
9-2).
P0.0-P0.7
P1.0-P1.7
VCC
VSS
GND
+5V
D0-D7
A0-A7
A8-A15
AT/TS8xC51Rx2
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