King Billion Electronics Co., Ltd
HE84770
駿 億 電 子 股 份 有 限 公 司
HE80000 SERIES
VDD
FXI
FXI
FXO
Crystal Osc.
RC Osc.
MO_FXTAL Fast clock type
0
1
RC Oscillator.
Crystal Oscillator.
Slow clock is clock source for LCD display, Timer1, and Timer Base, etc. Two types of oscillator, crystal
and RC, can be used as slow clock by mask option MO_SXTAL. If used for 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 Slow clock type
0
1
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 Fast, 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 power saving, etc.
OP1
Field
Mode
Reset
Bit 7
Bit 6
Bit 5
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
-
DRDY STOP SLOW
R/W
1
R/W
0
R/W
0
OP2
Field
Mode
Reset
Bit 7
Bit 6
Bit 5
Bit 4
TBE
R/W
0
Bit 3
Bit 2
Bit 1
Bit 0
IDLE PNWK TCWK
TBS[3..0]
R/W
0
R
-
R
-
W
-
W
-
W
-
W
-
August 25, 2003
Page 15 of 30
V2.6E
This specification is subject to change without notice. Please contact sales person for the latest version before use.
KB [ King blillion Electronics Co.,Ltd. ]
