HT1625
Application Circuits
C
S
D
*
V
D
D
R
W
D
*
V
R
R
V
L
C
D
A
T
A
M
C
U
H
T
1
6
2
5
*
B
Z
R
P
i
e
z
o
I
O
O
R
Q
B
Z
S
S
C
I
O
C
l
o
c
k
O
u
t
C
C
O
M
0
~
C
O
M
7
S
E
G
0
~
S
E
G
6
3
E
E
x
x
t
t
e
e
r
r
n
n
a
a
l
l
C
C
l
l
o
o
c
c
k
k
1
2
(
(
3
3
2
2
k
k
H
H
z
z
)
)
1
/
4
B
i
a
s
,
1
/
8
D
u
t
y
O
n
-
c
h
i
p
O
S
C
L
C
D
P
a
n
e
l
C
r
y
s
t
a
l
3
2
7
6
8
H
z
The connection of IRQ and RD pin can be selected depending on the requirement of the MCU.
The voltage applied to VLCD pin must be lower than VDD
Note:
.
Adjust VR to fit LCD display, at VDD=5V, VLCD=4V, VR=15kW±20%.
Adjust R (external Pull-high resistance) to fit user¢s time base clock.
Instruction Set Summary
Name
READ
ID
Command Code
D/C
D
Function
Read data from the RAM
Write data to the RAM
Def.
1 1 0 A6A5A4A3A2A1A0D0D1D2D3
1 0 1 A6A5A4A3A2A1A0D0D1D2D3
WRITE
D
READ-MODIFY-
WRITE
1 0 1 A6A5A4A3A2A1A0D0D1D2D3
1 0 0 0000-0000-X
D
C
Read and Write data to the RAM
Turn off both system oscillator and LCD bias
generator
SYS DIS
Yes
Yes
SYS EN
1 0 0 0000-0001-X
1 0 0 0000-0010-X
1 0 0 0000-0011-X
1 0 0 0000-0100-X
1 0 0 0000-0101-X
1 0 0 0000-0110-X
1 0 0 0000-0111-X
1 0 0 0000-1000-X
1 0 0 0000-1101-X
1 0 0 0000-1111-X
1 0 0 0001-10XX-X
C
C
C
C
C
C
C
C
C
C
C
Turn on system oscillator
LCD OFF
LCD ON
Turn off LCD display
Turn on LCD display
TIMER DIS
WDT DIS
TIMER EN
WDT EN
Disable time base output
Yes
Yes
Disable WDT time-out flag output
Enable time base output
Enable WDT time-out flag output
Turn off tone outputs
TONE OFF
CLR TIMER
CLR WDT
RC 32K
Yes
Clearthecontentsofthetimebasegenerator
Clear the contents of the WDT stage
System clock source, on-chip RC oscillator Yes
System clock source, external 32kHz clock
source or crystal oscillator 32.768kHz
EXT (XTAL) 32K 1 0 0 0001-11XX-X
C
Rev. 1.10
12
September 11, 2002
ETC [ ETC ]
