HT66F25D View Datasheet(PDF) - Holtek Semiconductor
Part Name
Description
MFG CO.
'HT66F25D' PDF : 177 Pages View PDF
A/D Flash Type 8-bit MCU with EEPROM
HT66F24D/HT66F25D
I/O Pin Structures
The accompanying diagrams illustrate the internal structures of some generic I/O pin types. As
the exact logical construction of the I/O pin will differ from these drawings, they are supplied as
a guide only to assist with the functional understanding of the I/O pins. The wide range of pin-
shared structures does not permit all types to be shown. The diagrams illustrate the I/O pin internal
structures. As the exact logical construction of the I/O pin may differ from these drawings, they are
supplied as a guide only to assist with the functional understanding of the I/O pins.
D a ta B u s
C o n tr o l B it
D
Q
P u ll- H ig h
R e g is te r
S e le c t
V DD
W eak
P u ll- u p
W r ite C o n tr o l R e g is te r
C h ip R e s e t
R e a d C o n tr o l R e g is te r
W r ite D a ta R e g is te r
R e a d D a ta R e g is te r
CK Q
S
D a ta B it
D
Q
CK Q
S
M
U
X
I/O p in
S y s te m W a k e -u p
W a k e - u p S e le c t P A o n ly
Generic Input/Output Structure
D a ta B u s
W r ite C o n tr o l R e g is te r
C h ip R e s e t
R e a d C o n tr o l R e g is te r
W r ite D a ta R e g is te r
R e a d D a ta R e g is te r
T o A /D C o n v e rte r
C o n tr o l B it
D
Q
P u ll- H ig h
R e g is te r
S e le c t
C KS Q
V DD
W eak
P u ll- u p
D a ta B it
D
Q
C KS Q
M
U
X
A n a lo g
In p u t
S e le c to r
A C S 4,A C S 2~A C S 0
A/D Input/Output Structure
A /D In p u t P o rt
Rev. 1.10
65
March 25, 2013
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