HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 336

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 9 16-Bit Timer Pulse Unit (TPU)
Bits 4 and 3—Clock Edge 1 and 0 (CKEG1, CKEG0): These bits select the input clock edge.
When a both-edges count is selected, a clock divided by two from the input clock can be selected.
(e.g. /4 both edges = /2 rising edge). If phase counting mode is used on channels 1, and 2, this
setting is ignored and the phase counting mode setting has priority.
Bit 4
CKEG1
0
1
Note: Internal clock edge selection is valid when the input clock is /4 or slower. If /1 is selected
Bits 2, 1, and 0—Time Prescaler 2, 1, and 0 (TPSC2 to TPSC0): These bits select the TCNT
counter clock. The clock source can be selected independently for each channel. Table 9.4 shows
the clock sources that can be set for each channel.
Table 9.4
Channel
0
1
2
Legend:
Blank: No setting
Rev.3.00 Mar. 26, 2007 Page 294 of 772
REJ09B0355-0300
:
as the input clock, this setting is ignored and count at falling edge of
Setting
/1
Bit 3
CKEG0
0
1
—
TPU Clock Sources
/4
Description
Count at rising edge
Count at falling edge
Count at both edges
/16
Internal Clock
/64
/256
/1024
TCLKA TCLKB TCLKC TCLKD
External Clock
is selected.
(Initial value)