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HARDWARE CONFIGURATION
2-33
I/O PORTS
•
State in watch mode
When the SPL bit of the standby-control register is set to 1, in the stop
mode, the output impedance goes High irrespective of the value of the
PDR.
Internal data bus
Stop mode (SPL = 1)
PDR
Output latch
PDR read
PDR write
Pin
Pch
VFDP
Pull-down resistor
(Option)
Fig. 2.17 Ports 40 to 47, 50 to 57 and 60 to 67
(9) BZ: P-ch open-drain high-withstand-voltage output
•
Buzzer output
A waveform at the frequency set by the buzzer register (BUZR) is output
to the pin.
•
State when reset
When reset, the buzzer register (BUZR) is initialized to 0 and the output
impedance goes High.
•
State in Stop mode
With the SPL bit of the standby control register is set to 1, the output im-
pedance goes High irrespective of the BUZR value.
Stop mode (SPL = 1)
Pin
Pch
Buzzer circuit
Fig. 2.18 BZ
Содержание F2MC-8L Series
Страница 121: ...INSTRUCTIONS 4 7 4 5 F2MC 8L FAMILY INSTRUCTION MAP ...
Страница 123: ...5 MASK OPTIONS ...
Страница 125: ...APPENDIX ...