EM78R911 Ver la hoja de datos (PDF) - ELAN Microelectronics
Número de pieza
componentes Descripción
Fabricante
EM78R911 Datasheet PDF : 37 Pages
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EM78911
8-bit micro-controller
VI.Pin Descriptions
PIN
I/O
VDD
POWER
AVDD
GND
POWER
AVSS
Xtin
I
Xtout
O
COM0..COM7 O
COM8..COM15 O (PORT6)
SEG0...SEG43 O
SEG44..SEG51 O (PORT8)
SEG52..SEG59 O (PORT9)
PLLC
I
TIP
I
RING
I
CWTIP
I
GAIN
I
RDET1
I
/RING TIME I
INT0
INT1
INT2
INT3
P5.4 ~P5.7
PORT7(0)
PORT7(1)
PORT7(2)
PORT7(3)
PORT7(4:7)
PORT5
P6.0 ~P6.7
PORT6
P7.0 ~P7.7
PORT7
P8.0 ~P8.7
P9.0 ~P9.7
PORT8
PORT9
TEST
I
DTMF
O
RESET
I
DESCRIPTION
digital power
analog power
digital ground
analog ground
Input pin for 32.768 kHz oscillator
Output pin for 32.768 kHz oscillator
Common driver pins of LCD drivers
Segment driver pins of LCD drivers
PORT9 AS FUNCTION KEY CAN WAKE UP WATCHDOG.
Phase loop lock capacitor, connect a capacitor 0.01u to 0.047u with
AVSS
Should be connected with TIP side of twisted pair lines for FSK.
Should be connected with RING side of twisted pair lines for FSK.
Should be connected with TIP side of twisted pair lines for CW.
OP output pin for gain adjustment.
Detect the energy on the twisted pair lines . These two pins coupled to
the twisted pair lines through an attenuating network.
Determine if the incoming ring is valid.An RC network may be
connected to the pin.
PORT7(0)~PORT7(3) signal can be interrupt signals.
Int2 and int3 has the same interrupt flag.
IO port
PORT 5 can be INPUT or OUTPUT port each bit.
Shared with LCD segment signals
PORT 6 can be INPUT or OUTPUT port each bit.
Shared with LCD common signals
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Key scan function.
PORT 8 can be INPUT or OUTPUT port each bit.
And shared with Segment signal.
PORT 9 can be INPUT or OUTPUT port each bit.
And can be set to wake up watch dog timer.
And shared with Segment signal.
Test pin into test mode , normal low
DTMF tone output
4
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