h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 214

• Manufacturer Part Number: h8s-2628
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 10 16-Bit Timer Pulse Unit (TPU)
10.3.1
The TCR registers are 8-bit readable/writable registers that control the TCNT operation for each
channel. The TPU has a total of six TCR registers, one for each channel (channels 5 to 0). TCR
register settings should be conducted only when TCNT operation is stopped.
Rev. 3.00 Oct 04, 2005 page 174 of 598
REJ09B0155-0300
Bit
7
6
5
4
3
2
1
0
Bit Name
CCLR2
CCLR1
CCLR0
CKEG1
CKEG0
TPSC2
TPSC1
TPSC0
Timer Control Register (TCR)
Initial value
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Counter Clear 2 to 0
These bits select the TCNT counter clearing source.
See tables 10.3 and 10.4 for details.
Clock Edge 1 and 0
These bits select the input clock edge. When the
input clock is counted using both edges, the input
clock period is halved (e.g. /4 both edges = /2
rising edge). If phase counting mode is used on
channels 1, 2, 4, and 5, this setting is ignored and
the phase counting mode setting has priority. Internal
clock edge selection is valid when the input clock is
is /1, or when overflow/underflow of another
channel is selected.
00: Count at rising edge
01: Count at falling edge
1 : Count at both edges
Legend:
Time Prescaler 2 to 0
These bits select the TCNT counter clock. The clock
source can be selected independently for each
channel. See tables 10.5 to 10.10 for details.
Description
/4 or slower. This setting is ignored if the input clock
: Don’t care