參數(shù)資料
型號: M37225MC-XXXSP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝: 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁數(shù): 73/128頁
文件大?。?/td> 1481K
代理商: M37225MC-XXXSP
M37225M6/M8/MA/MC-XXXSP, M37225ECSP
Rev.1.00
Nov 01, 2000
page 47 of 124
REJ03B0136-0100Z
Fig. 8.7.3 14-bit PWM Timing (f(XIN) = 8 MHz)
0.25
s
b7b0
b6b5b4b3b2b1
0
01
0110
b13b6
00
01
0110
b0
b5
10
100
0
Set “2C16” to DAi-H register.
[DAi-H
register]
DH
At writing of DAi-L
b0
b6b5b4b3b2b1
0
10100
Set “2816” to DAi-L register.
[DAi-L register]
DL
At writing of DAi-L
These bits decide HIGH level area
of fundamental waveform.
These bits decide smaller interval “tm” in which HIGH leval
area is [HIGH level area of fundamental waveform +
τ ].
=
Minimum
resolution bit
width 0.25
s
High-order 8-bit
value of DAi latch
HIGH level area of
fundamental waveform
FF
00
D3
FE FD … D6
D4
02 01
D5
14-bit
PWM output
8-bit
counter
0.25
s44
FF
00
D3
FE FD
D6
D4
02 01
D5
14-bit
PWM output
8-bit
counter
0.25
s45
Fundamental
waveform
Waveform of smaller interval “tm” specified by low-order 6 bits
Fundamental waveform of smaller interval
“tm” which is not specified by low-order 6
bits is not changed.
14-bit PWM output
Low-order 6-bit output of
DAi latch
0.25
s44
τ = 0.25 s
T = 4096
s
Repeat period
t0
t1
t2
t3
t4
t5
t59
t60
t61
t62
t63
[DAi latch]
……
b7
2C 2B 2A
03 02 01 00
2C 2B 2A
03 02 01 00
Note: i indicates 0 or 1.
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