w78e516b Winbond Electronics Corp America, w78e516b Datasheet - Page 21

• Manufacturer Part Number: w78e516b
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

W78E516B
6.3 Encryption
This bit is used to enable/disable the encryption logic for code protection. Once encryption feature is
enabled, the data presented on port 0 will be encoded via encryption logic. Only whole chip erase will
reset this bit.
6.4 Oscillator Control
W78E516B/E516 allow user to diminish the gain of on-chip oscillator amplifier by using programmer to
set the bit B7 of security register. Once B7 is set to 0, a half of gain will be decreased. Care must be
taken if user attempts to diminish the gain of oscillator amplifier, reducing a half of gain may
improperly affect the external crystal operation at high frequency above 24 MHz. The value of R and
C1, C2 may need some adjustment while running at lower gain.
Publication Release Date: April 22, 2008
- 21 -
Revision A12