P80C32 datasheet(50/62 Pages) PHILIPS

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Philips Semiconductors

Product data

P80C3xX2; P80C5xX2;

P87C5xX2

80C51 8-bit microcontroller family

4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V),

low power, high speed (30/33 MHz)

2003 Jan 24

Table 9. EPROM Programming Modes

MODE

RST

PSEN

ALE/PROG

EA/VPP

P2.7

P2.6

P3.7

P3.6

P3.3

Read signature

Program code data

VPP

Verify code data

Pgm encryption table

VPP

Pgm security bit 1

VPP

Pgm security bit 2

VPP

Pgm security bit 3

VPP

Program to 6-clock mode

VPP

Verify 6-clock4

Verify security bits5

NOTES:

1. ‘0’ = Valid low for that pin, ‘1’ = valid high for that pin.

2. VPP = 12.75 V ±0.25 V.

3. VCC = 5 V±10% during programming and verification.

4. Bit is output on P0.4 (1 = 12x, 0 = 6x).

5. Security bit one is output on P0.7.

Security bit two is output on P0.6.

Security bit three is output on P0.3.

ALE/PROG receives 5 programming pulses for code data (also for user array; 5 pulses for encryption or security bits) while VPP is held at

12.75 V. Each programming pulse is low for 100

µs (±10 µs) and high for a minimum of 10 µs.

Table 10. Program Security Bits for EPROM Devices

PROGRAM LOCK BITS1, 2

SB1

SB2

SB3

PROTECTION DESCRIPTION

No Program Security features enabled. (Code verify will still be encrypted by the Encryption Array if

programmed.)

MOVC instructions executed from external program memory are disabled from fetching code bytes

from internal memory, EA is sampled and latched on Reset, and further programming of the EPROM

is disabled.

Same as 2, also verify is disabled.

Same as 3, external execution is disabled. Internal data RAM is not accessible.

NOTES:

1. P – programmed. U – unprogrammed.

2. Any other combination of the security bits is not defined.

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