M38B59MD-XXXFS 데이터 시트보기 (PDF) - Renesas Electronics
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M38B59MD-XXXFS Datasheet PDF : 70 Pages
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MITSUBISHI MICROCOMPUTERS
38B5 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
Real time port
control bit “1”
QD
P85
P85 data for real time port
“0”
P85 direction
Real time port
Latch control bit (P85) “0”
Timer X mode register
register
P85 latch
“1”
write signal
Real time port
control bit “1”
QD
P86 data for real time port
P86
XCIN
P86 direction “0”
Latch
register
P86 latch
Real time port
control bit (P86) “0”
1/2
“1”
Timer X mode register
write signal
Internal system clock
“1” selection bit
1/2
XIN
“0”
1/8
Count source selection bit
1/64
Timer X operating
Timer X stop
control bit
Timer X write
control bit
P61/CNTR0/CNTR2
CNTR2 active
edge switch bit
“0”
mode bit
“00”,“01”,“11”
Timer X latch (low-order) (8) Timer X latch (high-order) (8)
Timer X (low-order) (8)
Timer X (high-order) (8)
“10”
“1”
Pulse width
measurement mode
CNTR2 active
edge switch bit “0”
QS
Pulse output mode
P61 direction
register
“1”
P61 latch
T
Q
Data bus
Timer X
interrupt request
Pulse output mode
CNTR0
Fig. 17 Block Diagram of Timer X
b7
b0
b7
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
b2 b1
0 0 : f(XIN)/2 or f(XCIN)/4
0 1 : f(XIN)/8 or f(XCIN)/16
1 0 : f(XIN)/64 or f(XCIN)/128
1 1 : Not available
Not used (returns "0" when read)
Timer X operating mode bits
b5 b4
0 0 : Timer mode
0 1 : Pulse output mode
1 0 : Event counter mode
1 1 : 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
Fig. 18 Structure of Timer X Related Registers
b0
Timer X mode register 2
(TXM2 : address 002F16)
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)
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