MT9094 Mitel Networks Corporation, MT9094 Datasheet - Page 3

• Manufacturer Part Number: MT9094
• Description: ISO2-CMOS ST-BUS FAMILY Digital Telephone (DPhone-II)
• Manufacturer: Mitel Networks Corporation

NOTES:
Intel and MCS-51 are registered trademarks of Intel Corporation, Santa Clara, CA, USA.
Pin Description (continued)
Pin #
22-3
19,
14
15
16
17
18
20
21
34
35
36
37
38
39
40
41
42
43
44
3
HSPKR+ Non-Inverting Handset Speaker (Output). Output to the handset speaker (balanced).
HSPKR- Inverting Handset Speaker (Output). Output to the handset speaker (balanced).
DATA 2 Serial Data Transmit. In an alternate mode of operation, this pin is used for data transmit from
DATA 1 Bidirectional Serial Data. Port for microprocessor serial data transfer compatible with
S1-S12 Segment Drivers (Output). 12 independently controlled, two level, LCD segment drivers. An
SPKR+ Non-Inverting Speaker (Output). Output to the speakerphone speaker (balanced).
SPKR- Inverting Speaker (Output). Output to the speakerphone speaker (balanced).
Name
SPKR
MIC+
V
MIC-
V
V
WD
V
CS
NC
BP
M-
IC
SSD
SSA
DD
SS
MT9094. In the default mode, serial data transmit and receive are performed on the DATA 1 pin
and DATA 2 is tri-stated.
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.
Chip Select (Input). This input signal is used to select the device for microport data transfers.
Active low. (TTL level compatible.)
Watchdog (Output). Watchdog timer output. Active high.
Internal Connection. Tie externally to V
No Connection. No internal connection to these pins.
Digital Ground. Nominally 0 volts.
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.
Backplane Drive (Output). A two-level output voltage for biasing an LCD backplane.
Positive Power Supply (Input). Nominally 5 volts.
Power Supply Rail for Analog Output Drivers. Nominally 0 Volts.
Inverting Handsfree Microphone (Input).
pin.
Non-inverting Handsfree Microphone (Input).
non-inverting input pin.
Analog Ground. Nominally 0 V.
Inverting Microphone (Input). Inverting input to microphone amplifier from the handset
microphone.
Description
SS
for normal operation.
Handsfree microphone amplifier inverting input
Handsfree microphone amplifier
MT9094
7-47