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EM78910A Schematic ( PDF Datasheet ) - ELAN Microelectronics Corp

Teilenummer EM78910A
Beschreibung 8-BIT MICRO-CONTROLLER
Hersteller ELAN Microelectronics Corp
Logo ELAN Microelectronics Corp Logo 




Gesamt 30 Seiten
EM78910A Datasheet, Funktion
EM78910/910A
8-BIT MICRO-CONTROLLER
Version 1.0
ELAN MICROELECTRONICS CORP.
No. 12, Innovation 1st RD., Science-Based Industrial Park
Hsin Chu City, Taiwan, R.O.C.
TEL: (03) 5639977
FAX: (03)5782037(SL) 5780617 (SA2)






EM78910A Datasheet, Funktion
EM78910/910A
8-bit Micro-controller
VI. Pin Descriptions
PIN
VDD,
VDD1
AVDD
VSS
AVSS
XIN
XOUT
PLLC
I/O
POWER
POWER
I
O
I
RTF I
MEI I
TIP
RING
I
I
CWTIP
CWGS
RDET1
I
I
I
/RINGTIME
INT0
INT1
INT2
INT3
P5.4 ~P5.7
P6.0 ~P6.7
P7.0 ~P7.7
I
PORT7(0)
PORT7(1)
PORT7(2)
PORT7(3)
PORT7(4:7)
PORT5
PORT6
PORT7
P9.0 ~P9.7
TEST
DTMF
/RESET
PORT9
I
O
I
DESCRIPTION
Digital power
Analog power
Digital ground
Analog ground
Input pin for 32.768 kHz oscillator
Output pin for 32.768 kHz oscillator
Phase loop lock capacitor, connect a capacitor 0.01u to 0.047u with
AVSS
Request to flash input. Detect line DC voltage changed
Multiple extension internetworking input. 1.2 DC voltage detection
can be used as on-hook/off-hook detection.
It should be connected with TIP side of twisted pair lines for FSK.
It should be connected with RING side of twisted pair lines for
FSK.
It should be connected with TIP side of twisted pair lines for CW.
The input OP output pin for gain adjustment of CW.
It detect the energy on the twisted pair lines. This pin is coupled to
the twisted pair lines through an attenuating network for ring signal
detect.
Determine if the incoming ring is valid. A 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.
PORT 6 can be INPUT or OUTPUT port each bit.
PORT 7 can be INPUT or OUTPUT port each bit.
Internal Pull high function.
Key scan function.
PORT 9 can be INPUT or OUTPUT port each bit.
And can be set to wake up watchdog timer.
Test pin into test mode , normal low
DTMF tone output
reset
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
~ 4~
2001/01/12

6 Page









EM78910A pdf, datenblatt
EM78910/910A
8-bit Micro-controller
* Bit 5 (/WUP9H) : PORT9’s high nibble wakeup control, 1/0 ! enable/disable
It is used to enable the wakeup function of high nibble for PORT9.
* Bit 6 (/WDTE) : Watchdog timer control, 1/0 ! enable/disable
It is used to enable/disable Watchdog timer.
The relation between Bit3 to Bit6 can see the diagram 9.
* Bit 7(CWPWR) : Power control of Call waiting circuit, 1/0 ! power up circuit /power down circuit
When Call waiting circuit is powered on, PLL is also enabled regardless of RA bit 6(ENPLL). When Call
waiting circuit is powered off, PLL status is depended on RA bit 6 (ENPLL) setting.
/WURING
/RINGTIME
/WUP9L
PORT9(3:0)
/WUP9H
PORT9(7:4)
/WDTE
/WDTEN 0/1=enable/disable
Fig.9 Wake up function and control signal
14. RF (Interrupt status register)
7
6
5
4 321
0
INT3
FSK/CW C8_2 C8_1 INT2 INT1 INT0 TCIF
* Bit 0 (TCIF) : TCC timer overflow interrupt flag. Set when TCC timer overflows.
* Bit 1 (INT0) : External INT0 pin interrupt flag
* Bit 2 (INT1) : External INT1 pin interrupt flag
* Bit 3 (INT2) : External INT2 pin interrupt flag
* Bit 4 (C8_1) : Internal 8 bit counter interrupt flag
* Bit 5 (C8_2) : Internal 8 bit counter interrupt flag
* Bit 6 ( FSK/CW ) : FSK data or Call waiting data interrupt flag
* Bit 7 (INT3) : External INT3 pin interrupt flag.
High to low edge trigger. Refer to the Interrupt subsection.
IOCF is the interrupt mask register. User can read and clear.
"1" means interrupt request, "0" means non-interrupt
15. R10~R3F (General Purpose Register)
* R10~R3F (Banks 0~3) are all general-purpose registers.
VII.2 Special Purpose Registers
1. A (Accumulator)
Internal data transfer, or instruction operand holding
It's not an addressable register.
2. CONT (Control Register : P70 interrupt edge, INT flag, TCC edge, precaler rate selection for TCC or WDT )
7 6543210
INT_EDGE INT TS TE PAB PSR2 PSR1 PSR0
* Bit 2~0 (PSR2~PSR0) : TCC/WDT prescaler bits.
__________________________________________________________________________________________________________________________________________________________________
* This specification are subject to be changed without notice.
~ 10~
2001/01/12

12 Page





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