Section 10 Port Output Enable (POE)
Rev. 3.00 Sep. 27, 2007 Page 396 of 758
REJ09B0243-0300
10.4 Operation
Table 10.4 shows the target pins for high-impedance control and conditions to place the pins in
high-impedance state.
Table 10.4 Target Pins and Conditions for High-Impedance Control
Pins Conditions
Detailed
Conditions
MTU2 high-current pins
(PE9/TIOC3B and
PE11/TIOC3D)
Input level detection,
output level comparison, or
SPOER setting
MTU2P1CZE
•
((POE3F + POE1F + POE0F) +
(OSF1
•
OCE1) + (MTU2CH34HIZ))
MTU2 high-current pins
(PE12/TIOC4A and
PE14/TIOC4C)
Input level detection,
output level comparison, or
SPOER setting
MTU2P2CZE
•
((POE3F + POE1F + POE0F) +
(OSF1
•
OCE1) + (MTU2CH34HIZ))
MTU2 high-current pins
(PE13/TIOC4B and
PE15/TIOC4D)
Input level detection,
output level comparison, or
SPOER setting
MTU2P3CZE
•
((POE3F + POE1F + POE0F) + (OSF1
•
OCE1) + (MTU2CH34HIZ))
MTU2 channel 0 pin
(PE0/TIOC0A)
Input level detection or
SPOER setting
MTU2PE0ZE
((POE8F
•
POE8E) + (MTU2CH0HIZ))
MTU2 channel 0 pin
(PE1/TIOC0B)
Input level detection or
SPOER setting
MTU2PE1ZE
((POE8F
•
POE8E) + (MTU2CH0HIZ))
MTU2 channel 0 pin
(PE2/TIOC0C)
Input level detection or
SPOER setting
MTU2PE2ZE
((POE8F
•
POE8E) + (MTU2CH0HIZ))
MTU2 channel 0 pin
(PE3/TIOC0D)
Input level detection or
SPOER setting
MTU2PE3ZE
((POE8F
•
POE8E) + (MTU2CH0HIZ))
10.4.1
Input Level Detection Operation
If the input conditions set by ICSR1 occur on the
POE0
,
POE1
,
POE3
*, and
POE8
pins, the high-
current pins and the pins for channel 0 of the MTU2 are placed in high-impedance state. Note
however, that these high-current and MTU2 pins enter high-impedance state only when general
input/output function or MTU2 function is selected for these pins.
(1) Falling Edge Detection
When a change from a high to low level is input to the
POE0
,
POE1
,
POE3
*, and
POE8
pins, the
high-current pins and the pins for channel 0 of the MTU2 are placed in high-impedance state.
Figure 10.2 shows a sample timing after the level changes in input to the
POE0
,
POE1
,
POE3
*,
and
POE8
pins until the respective pins enter high-impedance state.
Note: * This pin is supported only by the SH7125.
Содержание SH7124 R5F7124
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