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TSC87C51 Datasheet(PDF) 11 Page - TEMIC Semiconductors |
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TSC87C51 Datasheet(HTML) 11 Page - TEMIC Semiconductors |
11 / 22 page TSC87C51 11 MATRA MHS Rev. C – 10 Sept 1997 Preliminary +5V VCC P0.0–P0.7 P1.0–P1.7 P2.0–P2.3 VSS GND D0–D7 A0–A7 A8–A11 RST EA/VPP ALE/PROG PSEN P2.6 P2.7 P3.3 P3.7 P3.6 XTAL1 4 to 6 MHz CONTROL SIGNALS* PROGRAM SIGNALS* * See Table 5 for proper value on these inputs 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. |
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