Renesas SH7041 Series, Руководство по оборудованию, Страница: 323 / 923

285
Bit 4:
CKEG1 Bit 3:
CKEG0 Description
0 0 Count on rising edges (initial value)
1 Count on falling edges
1 X Count on both rising and falling edges
Notes: 1. X: 0 or 1, don’t care.
2. Internal clock edge selection is effective when the input clock is
φ
/4 or slower. When ø/1
or the overflow/underflow of another channel is selected for the input clock, although
values can be written, counter operation complies with the initial value (count on rising
edges).
•
Bits 2–0—Timer Prescaler 2–0 (TPSC2–TPSC0): TPSC2–TPSC0 select the counter clock
source for the TCNT. An independent clock source can be selected for each channel. Table
12.4 shows the possible settings for each channel.
Table 12.4 MTU Clock Sources
Internal Clock
Other Channel
External Clock
Chan-
nel
φ
/1
φ
/4
φ
/
16
φ
/
64
φ
/
256
φ
/
1024
Overflow/
Underflow TCL
KA TCL
KB TCL
KC TCL
KD
0 O O O O X X X O O O O
1 O O O O O X O O O X X
2 O O O O X O X O O O X
3 O O O O O O X O O X X
4 O O O O O O X O O X X
Note: Symbols: O: Setting possible X: Setting not possible
Channel 0:
Bit 2:
TPSC2 Bit 1:
TPSC1 Bit 0:
TPSC0
Description
0 0 0 Internal clock: count with
φ
/1 (initial value)
1 Internal clock: count with
φ
/4
1 0 Internal clock: count with
φ
/16
1 Internal clock: count with
φ
/64
1 0 0 External clock: count with the TCLKA pin input
1 External clock: count with the TCLKB pin input
1 0 External clock: count with the TCLKC pin input
1 External clock: count with the TCLKD pin input