W78LE51 Datasheet, PDF (9/21 Pages) Winbond – 8-BIT MTP MICROCONTROLLER

Preliminary W78LE51
Output Disable Condition
When the OE is set to high, no data output appears on the D7..D0.
Program Operation
This operation is used to program the data to MTP ROM and the security bits. Program operation is
done when the Vpp is reach to Vcp (12.5V) level, CE set to low, and OE set to high.
Program Verify Operation
All the programming data must be checked after program operations. This operation should be
performed after each byte is programmed; it will ensure a substantial program margin.
Erase Operation
An erase operation is the only way to change data from 0 to 1. This operation will erase all the MTP
ROM cells and the security bits from 0 to 1. This erase operation is done when the Vpp is reach to
Vep level, CE set to low, and OE set to high.
Erase Verify Operation
After an erase operation, all of the bytes in the chip must be verified to check whether they have been
successfully erased to 1 or not. The erase verify operation automatically ensures a substantial erase
margin. This operation will be done after the erase operation if Vpp = Vep(14.5V), CE is high and
OE is low.
Program/Erase Inhibit Operation
This operation allows parallel erasing or programming of multiple chips with different data. When
P3.6( CE ) = VIH, P3.7( OE ) = VIH, erasing or programming of non-targeted chips is inhibited. So,
except for the P3.6 and P3.7 pins, the individual chips may have common inputs.
Company/Device ID Read Operation
This operation is supported for MTP ROM programmer to get the company ID or device ID on the
W78LE51.
OPERATIONS P3.0 P3.1 P3.2 P3.3 P3.6
(A9 (A13 (A14 (OE _{( CE )}
CTRL) CTRL) CTRL) CTRL)
P3.7
( OE )
EA
(VPP)
P2,P1
P0
(A15..A0) (D7..D0)
NOTE
Read
0
0
0
0
0
0
1 Address Data Out
Output Disable 0
0
0
0
0
1
1
X
Hi-Z
Program
0
0
0
0
0
1 VCP Address Data In
Program Verify 0
0
0
0
1
0 VCP Address Data Out @3
Erase
1
0
0
0
0
1 VEP A0:0, Data In @4
others: X _0FFH
Erase Verify
1
0
0
0
1
0 VEP Address Data Out @5
Publication Release Date: December 1998
-9-
Revision A1