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| 型號(hào)： | HE8P480(S) |
| 文件頁(yè)數(shù)： | 6/50頁(yè) |
| 文件大?。?/td> | 553K |
| 代理商： | HE8P480(S) |
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KING BILLION ELECTRONICS CO., LTD
駿
億
電
子
股
份
有
限
公
司
HE8P480
HE80000 SERIES
D. Pin Description
6
V1.14
Pin Name
FXI
FXO
I/O
B
O
Function
Description
External fast clock pin.
Connecting to crystal
or RC to generate
32.768 kHz ~ 8MHz
frequency.
External slow clock
pin. Connecting with
32768 Hz crystal or
resistor as slow clock
and providing clock
source for LCD
display, TIMER1,
Time-Base and other
internal blocks.
SXI
SXO
I
O
Mask option setting
：
MO_FCK/SCKN= 00
Slow Clock only
01
Illegal
10
Dual Clock
11
Fast Clock only
MO_FOSCE = 0
Internal fast osc.
= 1
External fast osc.
MO_FXTAL = 0
RC osc. for fast clock
= 1
X’tal osc. for fast clock
MO_SXTAL = 0
RC for 32768 Hz clock
= 1
X’tal for 32768 Hz clock
Use OP1 and OP2 to switch among different operation
mode (NORMAL, SLOW, IDEL and SLEEP). In Dual
Clock mode, the main system clock is still the Fast Clock.
The 32768 Hz clock is for LCD and Timer 1 only.
Level trigger, active low. Except for using this pin, using
mask option (MO_PORE=1) could enable IC build-in
Power-on reset circuit.
Besides, MO_WDTE can set Watch Dog Timer
：
MO_WDTE= 0
Disable Watch Dog Timer
= 1
Enable Watch Dog Timer
Please bond this pin and add a test point on PCB for
debugging. But for improving ESD, please connect this
point with zero Ohm resistor to GND.
Mask options
：
MO_CPP[7..0] = 1
Push-pull.
= 0
Open-drain.
When use them as input (No tri-state structure), it must
Output “1” before reading.
RSTP_N
I
system reset
TSTP_P
I
TEST PIN
PRTC[7:0]/
PDATA[7:0]
B
Port C bi-directional
I/O pin, or parallel
program download
mode when
programming by
parallel mode.
I/O port / WAKEUP /
INT/ SDO: Series Data
Output
PRTD7/SDO
B
8-pin bi-directional I/O port. PRTD[7..2] as wake-up pin,
PRTD[7..6] as external interrupt pin, and
Mask options
：
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