TSC87C51-25MG データシートの表示（PDF） - Temic Semiconductors

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TSC87C51-25MG

CMOS 0 to 25 MHz Programmable 8–bit Microcontroller

Temic Semiconductors 

TSC87C51

PROGRAM

SIGNALS*

CONTROL

SIGNALS*

EA/VPP

ALE/PROG

RST

PSEN

P2.6

P2.7

P3.3

P3.6

P3.7

+5V

VCC

P0.0–P0.7

D0–D7

P1.0–P1.7

P2.0–P2.3

A0–A7

A8–A11

4 to 6 MHz

XTAL1

* See Table 5 for proper value on these inputs

VSS

GND

Figure 6 Set–up modes configuration

Programming algorithm

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 5.

To program the TSC87C51 the following sequence must be exercised:

D Step 1: Input the valid address on the address lines.

D Step 2: Input the appropriate data on the data lines.

D Step 3: Activate the combination of control signals.

D Step 4: Raise EA/VPP from VCC to VPP (typical 12.75V).

D Step 5: Pulse ALE/PROG 5 times.

Repeat step 1 through 5 changing the address and data for the entire array or until the end of the object file is reached

(see Figure 7).

Verify algorithm

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 TSC87C51.

To verify the TSC87C51 code the following sequence must be exercised :

D Step 1: Activate the combination of program signals.

D Step 2: Input the valid address on the address lines.

D Step 3: Input the appropriate data on the data lines.

D Step 4: Activate the combination of control signals.

Repeat step 2 through 4 changing the address and data for the entire array (see Figure 7).

The encryption array cannot be directly verified. Verification of the encryption array is done by observing that the code

array is well encrypted.

11

Rev. E – July 03, 2000

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