Section 9 Multi-Function Timer Pulse Unit 2 (MTU2)
Rev. 3.00 Sep. 27, 2007 Page 251 of 758
REJ09B0243-0300
TCLKC
TCNT_2
FFFD
TCNT_1
0001
TCLKD
FFFE
FFFF
0000
0001
0002
0001
0000
FFFF
0000
0000
Figure 9.21 Cascaded Operation Example (a)
Cascaded Operation Example (b) in SH7125:
Figure 9.22 illustrates the operation when
TCNT_1 and TCNT_2 have been cascaded and the I2AE bit in TICCR has been set to 1 to include
the TIOC2A pin in the TGRA_1 input capture conditions. In this example, the IOA0 to IOA3 bits
in TIOR_1 have selected the TIOC1A rising edge for the input capture timing while the IOA0 to
IOA3 bits in TIOR_2 have selected the TIOC2A rising edge for the input capture timing.
Under these conditions, the rising edge of both TIOC1A and TIOC2A is used for the TGRA_1
input capture condition. For the TGRA_2 input capture condition, the TIOC2A rising edge is used.
TCNT_2 value
H'0000
TGRA_1
TGRA_2
Time
TIOC1A
TIOC2A
TCNT_1
H'0514
H'0513
H'0512
H'0513
H'0512
H'C256
H'C256
H'FFFF
H'6128
As I1AE in TICCR is 0, data is not captured in TGRA_2 at the TIOC1A input timing.
Figure 9.22 Cascaded Operation Example (b)
Содержание SH7124 R5F7124
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