H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 456

• Manufacturer Part Number: H8S-2350
• Description: 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 10 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 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.
Note: Internal clock edge selection is valid when the input clock is /4 or slower. This setting is
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 10.4 shows
the clock sources that can be set for each channel.
Table 10.4 TPU Clock Sources
Legend:
Blank: No setting
Rev. 3.00 Sep 15, 2006 page 422 of 988
REJ09B0330-0300
Bit 4
CKEG1
0
1
Channel
0
1
2
3
4
5
:
ignored if the input clock is /1, or when overflow/underflow of another channel is selected.
Setting
/1
Bit 3
CKEG0
0
1
—
/4
/16
Internal Clock
Description
Count at rising edge
Count at falling edge
Count at both edges
/64
/256
/1024
/4096
TCLKA TCLKB TCLKC TCLKD Channel
External Clock
(Initial value)
Overflow/
Underflow
on Another