參數(shù)資料
型號(hào): M38B42E1H-XXXXFP
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
中文描述: 單芯片8位CMOS微機(jī)
文件頁(yè)數(shù): 20/78頁(yè)
文件大?。?/td> 1214K
代理商: M38B42E1H-XXXXFP
27
38B4 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
Fig. 21 Structure of timer X related registers
Fig. 20 Block diagram of timer X
CNTR2 active
edge switch bit
CNTR2 active
edge switch bit
Real time port
control bit
Real time port
control bit
S
“0”
“1”
“0”
“1”
“10”
“00”,“01”,“11”
Q
T
P61/CNTR0/CNTR2
CNTR0
“1”
“0”
“1”
“0”
“1”
“0”
Q D
P85
P86
“1”
“0”
XIN
XCIN
“1”
“0”
1/2
1/8
1/64
P61 latch
Timer X (low-order) (8)Timer X (high-order) (8)
Timer X latch (high-order) (8)
Timer X latch (low-order) (8)
Data bus
Pulse output mode
P61 direction
register
Pulse width
measurement mode
Timer X operating
mode bits
Timer X stop
control bit
Pulse output mode
Count source selection bit
Internal system clock
selection bit
D
iv
id
e
r
Timer X write
control bit
Timer X
interrupt request
Timer X mode register
write signal
P86 latch
P86 direction
register
P85 latch
P85 direction
register
Latch
P85 data for real time port
Real time port
control bit (P85)
P86 data for real time port
Real time port
control bit (P86)
Timer X mode register
write signal
b7b0
Timer X mode register 1
(TXM1 : address 002E16)
Timer X write control bit
0 : Write data to both timer latch and timer
1 : Write data to timer latch only
Timer X count source selection bits
b2b1
00 : f(XIN)/2 or f(XCIN)/4
01 : f(XIN)/8 or f(XCIN)/16
10 : f(XIN)/64 or f(XCIN)/128
11 : Not available
Not used (returns “0” when read)
Timer X operating mode bits
b5b4
00 : Timer mode
01 : Pulse output mode
10 : Event counter mode
11 : Pulse width measurement mode
CNTR2 active edge switch bit
0 : Event counter mode ; counts rising edges
Pulse output mode ; output starts with “H” level
Pulse width measurement mode ; measures “H” periods
1 : Event counter mode ; counts falling edges
Pulse output mode ; output starts with “L” level
Pulse width measurement mode ; measures “L” periods
Timer X stop control bit
0 : Count operating
1 : Count stop
Real time port control bit (P85)
0 : Real time port function is invalid
1 : Real time port function is valid
Real time port control bit (P86)
0 : Real time port function is invalid
1 : Real time port function is valid
P85 data for real time port
P86 data for real time port
Not used (returns “0” when read)
Timer X mode register 2
(TXM2 : address 002F16)
b7b0
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