參數(shù)資料
型號(hào)： HT86R384
廠商： Holtek Semiconductor Inc.
英文描述： Voice Synthesizer 8-Bit OTP MCU
中文描述： 語(yǔ)音合成器8位微控制器檢察官辦公室
文件頁(yè)數(shù)： 14/41頁(yè)
文件大?。?/td> 286K
代理商： HT86R384
HT86R384
Rev. 0.10
14
May 18, 2007
Preliminary
Oscillator Configuration
The HT86R384 provides two types of oscillator circuit
for the system clock, i.e., RC oscillator and crystal oscil-
lator. No matter what type of oscillator, the signal is used
for the system clock. The HALT mode stops the system
oscillatorandignoresexternalsignaltoconservepower.
If the RC oscillator is used, an external resistor between
OSC1 and VSS is required, and the range of the resis-
tance should be from 155k
clock, divided by 4, is available on OSC2 with pull-high
resistor, which can be used to synchronize external
logic. The RC oscillator provides the most cost effective
solution. However, the frequency of the oscillation may
vary with VDD, temperature, and the chip itself due to
process variations. It is therefore not suitable for timing
sensitive operations where accurate oscillator fre-
quency is desired.
to 300k . The system
On the other hand, if the crystal oscillator is selected, a
crystalacrossOSC1andOSC2isneededtoprovidethe
feedback and phase shift required for the oscillator, and
no other external components are required. Aresonator
may be connected between OSC1 and OSC2 to replace
the crystal and to get a frequency reference, but two ex-
ternal capacitors in OSC1 and OSC2 are required.
There is another oscillator circuit designed for Timer3 s
clock source as the RTC time base which is determined
by OTP option. If the OTP option determines that
Timer3 s clock source is from a 32kHz crystal, then a
32kHz crystal should be connected to XIN and XOUT.
Watchdog Timer
WDT
The WDT clock source is implemented by a dedicated
RC oscillator (WDT oscillator) or instruction clock (sys-
tem clock divided by 4), decided by OTP options. This
timer is designed to prevent a software malfunction or
sequence jumping to an unknown location with unpre-
dictable results. The Watchdog Timer can be disabled
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System Oscillator
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Watchdog Timer
Bit No.
Label
Function
0
EMI
Controls the master (global) interrupt (1= enabled; 0= disabled)
1
EEI
Controls the external interrupt (1= enabled; 0= disabled)
2
ET0I
Controls the Timer 0 interrupt (1= enabled; 0= disabled)
3
ET1I
Controls the Timer 1 interrupt (1= enabled; 0= disabled)
4
EIF
External interrupt request flag (1= active; 0= inactive)
5
T0F
Timer 0 request flag (1= active; 0= inactive)
6
T1F
Timer 1 request flag (1= active; 0= inactive)
7
Unused bit, read as 0
INTC (0BH) Register
Bit No.
Label
Function
0
ET2I
Controls the Timer 2 interrupt (1= enabled; 0= disabled)
1
ET3I
Controls the Timer 3 interrupt (1= enabled; 0= disabled)
2~3, 6~7
Unused bit, read as 0
4
T2F
Timer 2 interrupt request flag (1= active; 0= inactive)
5
T3F
Timer 3 interrupt request flag (1= active; 0= inactive)
INTCH (1EH) 1 Register
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