LC88F40H0PA Datasheet, PDF (13/32 Pages) Sanyo Semicon Device – For Car Audio Systems 16-bit ETR Microcontroller

LC88F40H0PA/H0PAU/F0PA/F0PAU/D0PA/D0PAU
Port Output Types
The port output type and pull-up resistance must be set using the registers.
The pin data can be read regardless of the I/O setting of the port.
The port output type (CMOS output or N-channel open drain output) and use/disuse of the pull-up resistor can be
configured separately for each port.
* Make the following connection to minimize the noise input to the VDDCPU pin and prolong the backup time.
Be sure to electrically short the VSS1, VSS2, VSS3 and VSS4 pins.
Example 1: When data is being backed up in the HOLD mode, the H level signals to the output ports are fed by the
backup capacitors. (VDDCPU = VDDPORT1 = VDDPORT2 = VDDPLL)
Power
supply
For
buckup
LSI
VDDCPU
VDDPORT1
LPFO
VDDPORT2
VDDPLL
VREG
VSS1 VSS2 VSS3 VSS4
Example 2: When data is being backed up in the HOLD mode, the H level output at any ports is not sustained and is
unpredictable. (VDDCPU = VDDPORT1 = VDDPORT2 = VDDPLL)
Power
supply
For
buckup
LSI
VDDCPU
VDDPORT1
LPFO
VDDPORT2
VDDPLL
VREG
VSS1 VSS2 VSS3 VSS4
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