EM78811 查看數據表（PDF） - ELAN Microelectronics
零件编号
产品描述 (功能)
生产厂家
EM78811 Datasheet PDF : 33 Pages
| |||
EM78811
8-BIT MICRO-CONTROLLER FOR TELECOM PRODUCT
PIN DESCRIPTIONS
Symbol
Type
VDD1,VDD2 POWER
AVDD
VSS1,VSS2 POWER
AVSS
XTin
I
XTout
O
COM0..COM7 O
COM8..COM15 O (PORT6)
SEG0..SEG43
SEG44..SEG51 0 (PORT8)
SEG52..SEG59 O (PORT9)
PLLC
I
TIP
I
RING
I
RDET1..RDET 2 I
/RING TIME
INT0
INT1
INT2
INT3
P7.0~P7.7
I
PORT7(0)
PORT7(1)
PORT7(2)
PORT7(3)
PORT7(4:7)
PORT7
P6.0~P6.7
P8.0~P8.7
P9.0~P9.7
PORT6
PORT8
PORT9
TEST
I
DTMF
O
RESET
I
Function
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 0.01µ to 0.047µ with AVSS.
Should be connected with TIP side of twisted pair lines
Should be connected with TIP side of twisted pair lines
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.
IO port
PORT 7 can INPUT or OUTPUT port each bit.
Internal Pull high function.
Key scan function. Bit6,7 has open drain function
PORT6 can be INPUT or OUTPUT port each bit.
And shared with common signal.
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
FUNCTION DESCRIPTION
Operational Registers
R0 (Indirect Addressing Register)
* R0 is not a physically implemented register. It is useful as indirect addressing pointer. Any instruction using
R0 as register actually accesses data pointed by the RAM Select Register (R4).
R1 (TCC)
* Increased by an external signal edge applied to TCC , or by the instruction cycle clock Written and read by
the program as any other register.
* This specification are subject to be changed without notice.
10.12.1998 4
Share Link: 