M30218 Datasheet, PDF (83/179 Pages) Mitsubishi Electric Semiconductor – M30218 Group

Timer B
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timer Bi register (Note)
(b15)
b7
(b8)
b0 b7
Symbol
Address
b0
TB0
039116, 039016
TB1
039316, 039216
TB2
039516, 039416
Function
• Timer mode
Counts the timer's period
• Event counter mode
Counts external pulses input or a timer overflow
• Pulse period / pulse width measurement mode
Measures a pulse period or width
Note: Read and write data in 16-bit units.
When reset
Indeterminate
Indeterminate
Indeterminate
Values that can be set R W
000016 to FFFF16
000016 to FFFF16
Count start flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
TABSR
Address
038016
When reset
0016
Bit symbol
TA0S
TA1S
TA2S
TA3S
TA4S
TB0S
TB1S
TB2S
Bit name
Timer A0 count start flag
Timer A1 count start flag
Timer A2 count start flag
Timer A3 count start flag
Timer A4 count start flag
Timer B0 count start flag
Timer B1 count start flag
Timer B2 count start flag
Function
0 : Stops counting
1 : Starts counting
RW
Clock prescaler reset flag
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
CPSRF
Address
038116
When reset
0XXXXXXX2
Bit symbol
Bit name
Function
RW
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be
indeterminate.
CPSR
Clock prescaler reset flag
0 : No effect
1 : Prescaler is reset
(When read, the value is “0”)
Figure TA-3. Timer B-related registers (2)
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