Holtek HT45F23A Manual page 63

HT45F23A/HT45F24A
TinyPower Flash MCU with OPA & Comparators
TM
S y s t e m
Port A has the additional capability of providing wake-up functions. When the devices are in the
SLEEP or IDLE Mode, various methods are available to wake the devices up. One of these is a high
to low transition of any of the Port A pins. Single or multiple pins on Port A can be setup to have this
function. In addition, the Port B pins also provide Open Drain I/O structure options which can be
controlled by the specific register.
W r i t e C o n t r o l R e g i s t e r
R e a d C o n t r o l R e g i s t e r
P A 7 / P A 6 / P A 5 / P C 5 / P C 6
B Z / B Z / P F D / P W M 0 / P W M 1
S y s t e m
Rev. 1.40
T 1 T 2 T 3
C l o c k
P o r t D a t a
R e a d f r o m P o r t
Read Modify Write Timing
P B 0 ~ P B 3 O p e n D r a i n O p t i o n
C o n t r o l B i t
D a t a B u s D
C K
S
C h i p R e s e t
D a t a B i t
D
W r i t e D a t a R e g i s t e r C K
S
R e a d D a t a R e g i s t e r
W a k e - u p ( P A 0 ~ P A 7 )
I N T 0 f o r P A 3 o n l y
I N T 1 f o r P B 0 o n l y
T C 0 f o r P A 1 o n l y
T C 1 f o r P A 4 o n l y
Generic Input/Output Ports
63
T 4 T 1 T 2 T 3 T 4
W r i t e t o P o r t
V
D D
P u l l - H i g h
O p t i o n
Q
Q
Q
Q
M
U
X
M B Z E N , P F D E N ,
U
P W M n E N
X
W a k e - u p R e g i s t e r
I / O p i n
March 29, 2019