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參數資料
型號: W53342
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 60" Voice/Melody/LCD Controller(60”話音/音樂/LCD控制器)
中文描述: 4-BIT, MROM, MICROCONTROLLER
文件頁數: 14/65頁
文件大小: 719K
代理商: W53342
W53322/W53342
- 14 -
the WDT can be switched to F
OSC
/16384 (or F
OSC
/1024) while WDTCK is written 1 ( or 0). In normal operation, the
application program must reset WDT (by CLR WDT) before it overflows. The WDT minimun overflow period is 500mS
when the system clock (F
OSC
) is 32 KHz and WDT clock input is F
OSC
/1024. The organization of watchdog timer is
shown in Figure 5
FLAG1 Register (FLAG1 with SR=23H)
Divider and watchdog counter can be reset by CLR FLAG1, #I instruction. Both CLR DIV and CLR WDT instructions can
be use to clear DIVR bit and WDTR bit separately. The bit descriptions are as following.
0
1
2
3
FLAG1
WDTR
X
DIVR
X
DIVR =0 no influence
=1 Divider counter is clear
WDTR=0 no influence
=1 Watchdog timer is clear
X means don't care value
All bit can be cleared only. At initial reset, FLAG1 is 0000B.
WDT
Fosc
Q1
Q2
Q9
Q10 Q11 Q12
Q14
Q13
. . .
R
R
R
R
Overflow signal
Enable
/Disable
Mask Option
Qw1
R
Qw2
R
Qw4
R
Qw3
R
System Reset
1. Reset
2. CLR FLAG1,#0010B
(CLR WDT)
Fosc/1024
Fosc/16384
MR1.3
(WDTCK)
Fs
Q1
Q2
Q9
Q10 Q11 Q12
Q14
Q13
. . .
Divider
R
R
R
R
S
R
Q
HEF.0
IEF.0
Hold mode release (HCF.0)
Divider interrupt (INT0)
1. Reset
2. CLR EVF,#01H
3. CLR FLAG1,#0100B
(CLR DIV)
EVF.0
Fosc/4096
Fosc/16384
SCR.3
(DIV5MB)
( 0)
( 1)
( 1)
( 0)
Figure 5. Organization of Divider and Watchdog Timer
Timer/Counter
1. Timer 0 (TM0)
Timer 0 (TM0) is a programmable 8-bit binary down-counter. The specified value can be loaded into TM0 by executing the
相關PDF資料
PDF描述
W53322 60" Voice/Melody/LCD Controller(60”話音/音樂/LCD控制器)
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W536060A VOICE/ MELODY / LCD CONTROLLER
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