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REJ09B0138-0600H
21.8
ø Clock Output Disabling Function
Output of the ø clock can be controlled by means of the PSTOP bit in SCKCR, and DDR for the corresponding port.
When the PSTOP bit is set to 1, the ø clock stops at the end of the bus cycle, and ø output goes high. ø clock output is
enabled when the PSTOP bit is cleared to 0. When DDR for the corresponding port is cleared to 0, ø clock output is
disabled and input port mode is set. Table 21-5 shows the state of the ø pin in each processing state.
Table 21-5 ø Pin State in Each Processing State
DDR
0
1
PSTOP
—
0
1
Hardware standby mode
High impedance
Software standby mode
High impedance
Fixed high
Sleep mode
High impedance
ø output
Fixed high
Normal operating state
High impedance
ø output
Fixed high
Содержание ZTAT H8S/2357F
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