W925E240 Datasheet, PDF (6/73 Pages) Winbond – 8-BIT CID MICROCONTROLLER

W925E/C240
Pin Description, continued
NAME
I/O
XOUT2
O
XIN2
I
DTMF/FSK O
BUZ
O
P00-P07
I/O
P10-P17
I/O
P20-P27
I/O
P30-P37
I/O
P40-P47
I/O
VPOS, VNEG I
DESCRIPTION
Output pin for sub-oscillator. Connected to 32.768KHz crystal only.
Suggest to add an external capacitor about 10~30pF to ground(VSS) for
the accuracy of the oscillator.
Input pin for sub-oscillator. Connected to 32.768KHz crystal only. Suggest
to add an external capacitor about 10~30pF to ground(VSS) for the
accuracy of the oscillator.
FTE=0, Dual-Tone Multi-Frequency(DTMF) signal output
FTE=1, FSK signal output
Buzzer output pin. If buzzer function is disabled, BUZ pin is in floating state.
Input/output port0. Port0 data can be bit controlled. The I/O mode is
controlled by P0IO register. Port0 is open drain type when it is configured
as output mode.
Input/output port1 with pull high resistors. Port1 data can be bit controlled.
The I/O mode is controlled by P1IO register. The P10-P13 and P14-P17
indicate the external interrupt pins(INT2 and INT3)
Input/output port2 with pull high resistors. Port2 data can be bit controlled.
The I/O mode is controlled by P2IO register.
Input/output port3 with pull high resistors. Port3 data can be bit controlled.
The I/O mode is controlled by P3IO register. The special function of port3 is
referred to the description of P3 register.
Contents are byte controlled. Pull high and I/O mode can be bit controlled.
The special function of P4 is referred to the description of P4 register.
The comparator V+, V- analog input pins. Share pin with P4.2 and P4.4
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