HD6413007F20 Datasheet, PDF (322/798 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

9. 16-Bit Timer
Channel Address*¹ Name
Abbre-
viation
R/W
2
H'FFF78 Timer control register 2
16TCR2 R/W
H'FFF79 Timer I/O control register 2
TIOR2
R/W
H'FFF7A Timer counter 2H
16TCNT2H R/W
H'FFF7B Timer counter 2L
16TCNT2L R/W
H'FFF7C General register A2H
GRA2H
R/W
H'FFF7D General register A2L
GRA2L
R/W
H'FFF7E General register B2H
GRB2H
R/W
H'FFF7F General register B2L
GRB2L
R/W
Notes: 1. The lower 20 bits of the address in advanced mode are indicated.
2. Only 0 can be written in bits 3 to 0, to clear the flags.
Initial
Value
H'80
H'88
H'00
H'00
H'FF
H'FF
H'FF
H'FF
9.2 Register Descriptions
9.2.1 Timer Start Register (TSTR)
TSTR is an 8-bit readable/writable register that starts and stops the timer counter (16TCNT) in
channels 0 to 2.
Bit
7
6
5
4
3
2
1
0
⎯
⎯
⎯
⎯
⎯
STR2 STR1 STR0
Initial value
1
1
1
1
1
0
0
0
Read/Write
⎯
⎯
⎯
⎯
⎯
R/W
R/W
R/W
Reserved bits
TSTR is initialized to H'F8 by a reset and in standby mode.
Counter start 2 to 0
These bits start and
stop 16TCNT2 to 16TCNT0
Bits 7 to 3⎯Reserved: These bits cannot be modified and are always read as 1.
Bit 2⎯Counter Start 2 (STR2): Starts and stops timer counter 2 (16TCNT2).
Bit 2
STR2
0
1
Description
16TCNT2 is halted
16TCNT2 is counting
(Initial value)
Rev.5.00 Sep. 12, 2007 Page 292 of 764
REJ09B0396-0500