HT1380A HOLTEK [Holtek Semiconductor Inc], HT1380A Datasheet - Page 9

• Manufacturer Part Number: HT1380A
• Description: Serial Timekeeper Chip
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

Timing Diagrams
Read Data Transfer
Write Data Transfer
Application Circuit
Note: * In order to obtain the correct frequency, it is recommended to use a crystal with a load capacitance of
Rev. 1.00
R E S T
S C L K
I / O
R E S T
S C L K
I / O
9.0pF. It is not recommended to connect load capacitors to the X1 and X2 pins. If the power line is noisy, it
is recommended to add R1 and C1 for filtering out noise.
t
t
D C
C C
V
D D
0
0
I n t e r f a c e
t
t
C C
D C
M C U
t
t
C D H
C D H
C o m m a n d B y t e
C o m m a n d B y t e
t
C L
7
7
C 1 *
0 . 1 m F
9
t
C H
S C L K
I / O
R E S T
H T 1 3 8 0 A / H T 1 3 8 1 A
t
0
0
C D D
V D D
O u t p u t D a t a B y t e
I n p u t D a t a B y t e
t
f
V S S
X 1
X 2
t
r
3 2 7 6 8 H z *
HT1380A/HT1381A
7
7
t
C C H
t
C D Z
t
C W H
June 15, 2012