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| 型號： | HE84G762(S) |
| 文件頁數(shù)： | 27/52頁 |
| 文件大小： | 631K |
| 代理商： | HE84G762(S) |
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KING BILLION ELECTRONICS CO., LTD
駿
億
電
子
股
份
有
限
公
司
HE84G761
HE80004 Series
June 30, 2003
This specification is subject to change without notice. Please contact sales person for the latest version before use.
27
V1.01
Ring Oscillator Frequency Table
C (pF)
R (K
)
40
20
14
7
4
2
30.20
19.92
9.98
0.8
1.2
2.3
1.5
2.2
4.0
2.0
2.8
5.1
3.0
4.4
7.5
4.0
5.6
9.4
5.0 MHz
7.0 MHz
11.4 MHz
Two types of oscillator, crystal and RC, can be used as slow clock selectable by mask option
MO_SXTAL. If used time keeping function or other applications that required the accurate timing, crystal
oscillator is recommended. If the timing accuracy is not important, then RC type oscillator can be used to
reduce cost.
MO_SXTAL
0
1
Slow clock type
R/C oscillator
Crystal oscillator
SXI
SXI
SXO
SXO
Crystal Osc.
RC Osc.
With two clock sources available, the system can switch among operation modes of Normal, Slow, Idle,
and Sleep modes by the setting of OP1 and OP2 registers as shown in tables below to suit the needs of
application such as high speed or low power, etc.
OP1
Field
Mode
Reset
Bit 7
DRDY
R/W
1
Bit 6
STOP
R/W
0
Bit 5
SLOW
R/W
0
Bit 4
INTE
R/W
0
Bit 3
T2E
R/W
0
Bit 2
T1E
R/W
0
Bit 1
Z
R/W
-
Bit 0
C
R/W
-
OP2
Field
Mode
Reset
Bit 7
IDLE
R/W
0
Bit 6
PNWK
R
-
Bit 5
TCWK
R
-
Bit 4
TBE
R/W
0
Bit 3
Bit 2
Bit 1
Bit 0
TBS[3..0]
W
-
W
-
W
-
W
-
If the dual clock mode is used, the LCD display, Timer1 and Timer Base will derive its clock source from
slow clock while the other blocks will operate with the fast clock.
12.
General Purpose I/O
There are three dedicated general purpose I/O port, PRTC, PRTD and PRT10, while PRT15[1..0] and
PRT17 are multiplexed with LCD segment driver pins. All the I/O Ports are bi-directional and of non-
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