MT9094 查看數據表（PDF） - Mitel Networks

零件编号

产品描述 (功能)

比赛名单

MT9094

ISO2-CMOS ST-BUS™ FAMILY Digital Telephone (DPhone-II)

Mitel Networks 

MT9094

Pin Description (continued)

Pin # Name

Description

14 DATA 2 Serial Data Transmit. In an alternate mode of operation, this pin is used for data transmit from

MT9094. In the default mode, serial data transmit and receive are performed on the DATA 1 pin

and DATA 2 is tri-stated.

15 DATA 1 Bidirectional Serial Data. Port for microprocessor serial data transfer compatible with

MCS-51 standard (default mode). In an alternate mode of operation , this pin becomes the data

receive pin only and data transmit is performed on the DATA 2 pin. Input level TTL compatible.

16 CS Chip Select (Input). This input signal is used to select the device for microport data transfers.

Active low. (TTL level compatible.)

17 WD Watchdog (Output). Watchdog timer output. Active high.

18

IC Internal Connection. Tie externally to VSS for normal operation.

19, NC No Connection. No internal connection to these pins.

20

21

22-3

3

VSSD

S1-S12

Digital Ground. Nominally 0 volts.

Segment Drivers (Output). 12 independently controlled, two level, LCD segment drivers. An

in-phase signal, with respect to the BP pin, produces a non-energized LCD segment. An

out-of-phase signal, with respect to the BP pin, energizes its respective LCD segment.

34 BP Backplane Drive (Output). A two-level output voltage for biasing an LCD backplane.

35 VDD Positive Power Supply (Input). Nominally 5 volts.

36 HSPKR- Inverting Handset Speaker (Output). Output to the handset speaker (balanced).

37 HSPKR+ Non-Inverting Handset Speaker (Output). Output to the handset speaker (balanced).

38 SPKR- Inverting Speaker (Output). Output to the speakerphone speaker (balanced).

39 SPKR+ Non-Inverting Speaker (Output). Output to the speakerphone speaker (balanced).

40 VSS Power Supply Rail for Analog Output Drivers. Nominally 0 Volts.

SPKR

41 MIC- Inverting Handsfree Microphone (Input). Handsfree microphone amplifier inverting input

pin.

42 MIC+ Non-inverting Handsfree Microphone (Input). Handsfree microphone amplifier

non-inverting input pin.

43 VSSA Analog Ground. Nominally 0 V.

44

M- Inverting Microphone (Input). Inverting input to microphone amplifier from the handset

microphone.

NOTES:

Intel and MCS-51 are registered trademarks of Intel Corporation, Santa Clara, CA, USA.

7-47

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