400
Bits 4 and 3—Clock Edge 1 and 0 (CKEG1, CKEG0): Select the external clock edge when the
external clock is selected, or when the input capture function is used.
Bit 4: CKEG1
Bit 3: CKEG0
Description
0
0
Count/capture register set on rising edge
(Initial value)
1
Count/capture register set on falling edge
1
X
Count/capture register set on both rising and falling edge
Note:
X means 0, 1, or ‘don’t care’.
Bits 2 to 0—Timer Prescaler 2 to 0 (TPSC2 to TPSC0): Select the TCNT count clock.
Bit 2: TPSC2
Bit 1: TPSC1
Bit 0: TPSC0
Description
0
0
0
Internal clock: count on P
φ
/4 (Initial
value)
1
Internal clock: count on P
φ/
16
1
0
Internal clock: count on P
φ
/64
1
Internal clock: count on P
φ
/256
1
0
0
Internal clock: count on clock output of on-chip
RTC (RTC CLK)
1
Count on TCLK pin input
1
0
Reserved (Setting prohibited)
1
Reserved (Setting prohibited)
Содержание SH7709S
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Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
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