M16C65 Datasheet, PDF (391/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
18. Timer B
Pulse Period/Pulse Width Measurement Modes
Timer Bi Mode Register (i = 0 to 5)
b7 b6 b5 b4 b3 b2 b1 b0
10
Symbol
TB0MR to TB2MR
TB3MR to TB5MR
Address
033Bh to 033Dh
031Bh to 031Dh
Bit Symbol
Bit Name
Function
After Reset
00XX 0000b
00XX 0000b
RW
TMOD0
b1 b0
RW
Operation mode select bit 1 0 : Pulse period/pulse width
TMOD1
measurement modes
RW
MR0
Measurement mode
select bit
MR1
b3 b2
0 0 : Pulse period measurement
(Measurement between a falling edge and
the next falling edge of measured pulse)
RW
0 1 : Pulse period measurement
(Measurement between a rising edge and
the next rising edge of measured pulse)
1 0 : Pulse width measurement
(Measurement between a falling edge and
the next rising edge of measured pulse
RW
and between a rising edge and the next
falling edge)
1 1 : Do not set
—
No register bit. If necessary, set to 0. Read as undefined value
—
MR3 Timer Bi overflow flag
0 : No overflow
1 : Overflow
RO
TCK0
b7 b6
0 0 : f1TIMAB or f2TIMAB
RW
Count source select bit 0 1 : f8TIMAB
TCK1
1 0 : f32TIMAB
RW
1 1 : fC32
MR3 (Timer Bi Overflow Flag) (b5)
This flag is undefined after reset. The MR3 bit is cleared to 0 (no overflow) by writing to the TBiMR
register. The MR3 bit cannot be set to 1 by a program.
TCK1-TCK0 (Count Source Select Bit) (b7-b6)
Enabled when the TCS3 bit or TCS7 bit in registers TBCS0 to TBCS3 is set to 0 (TCK0, TCK1
enabled).
Select f1TIMAB or f2TIMAB by the PCLK0 bit in the PCLKR register.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 356 of 791