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11

IC901

49 - STROBE
50 - LCDRS

Pin I/O

Name

High

High-Z

Low

Pin I/O

Name

High

High-Z

Low

1

I

X1

-

-

-

33 I/O

PLL  UNLOCK

Unlock

-

Lock

2 O

X2

-

-

-

34 I/O

CHARGE

Normal

-

Charge

3

I

GND

-

-

Fixed

35 I/O

CHARGE ID

Active

-

Active

4 O

OSC1

Active

-

Active

36 I/O

SP MUTE

Mute

-

OFF

5

I

OSC2

Active

-

Active

37 I/O

MIC MUTE

Mute

-

OFF

6

I

TEST terminal

-

-

Fixed

38 I/O

LIGHTED LED

ON

-

OFF

7

I

Pow er supply

Fixed

-

-

39 I/O

Not used

-

-

Fixed

8

I

RESET

Normal

-

Reset

40 I/O

KEY IN

OFF

-

ON

9 I/O

SSEN

Active

-

OFF

41 I/O

KEY IN

OFF

-

ON

10 I/O

PLL_CLOCK

Active

-

Active

42 I/O

KEY IN

OFF

-

ON

11 I/O

PLL_RST

OFF

-

Active

43 I/O

KEY IN

OFF

-

ON

12 I/O

PLL_DATA

Active

-

Active

44 I/O

KEY STRB

-

Normal

ON

13 I/O

RSSI1

Electric field

-

None

45 I/O

KEY STRB

-

Normal

ON

14 I/O

RSSI2

Electric field

-

None

46 I/O

KEY STRB

-

Normal

ON

15 I/O

SQLCH

Noise

-

Electric field

47 I/O

KEY STRB

-

Normal

ON

16 I/O

RXDATA

Active

-

Active

48 I/O

KEY STRB

-

Normal

ON

17 I/O LCD BACKLED

-

OFF

ON

49 I/O

KEY STRB

-

Normal

ON

18 I/O LCD BACKLED

-

OFF

ON

50 I/O

LCD RS

Register

-

Data

19 I/O LCD BACKLED

-

OFF

ON

51 I/O

LCD RW_WR

Read

-

Write

20 I/O BATT LOW ST

-

OFF

ON

52 I/O

LCD E_RD

Active

-

Active

21 I/O

VOL2

High

-

Low

53 I/O

LCD CSB

OFF

-

Active

22 I/O

VOL1

High

-

Low

54 I/O

DB7

Active

-

Active

23 I/O

ALARM

Active

-

Active

55 I/O

DB6

Active

-

Active

24 I/O

ALR_VOL

Low

-

High

56 I/O

DB5

Active

-

Active

25 I/O

RX RESET

Normal

-

Reset

57 I/O

DB4

Active

-

Active

26 I/O

TX RESET

Normal

-

Reset

58 I/O

LCD POWER

OFF

-

ON

27 I/O

SS RESET

Normal

-

Reset

59 I/O

LCD RESET

Normal

-

Reset

28 I/O

TX DATA

Active

-

Active

60 I/O

DTMF

-

-

-

29 I/O

TX POWER

-

OFF

ON

61 I/O

DTMF LEVEL

-

-

-

30 I/O

RX POWER

-

OFF

ON

62 I/O

BATT LOW

Normal

-

Low

31 I/O

POWER CTL

Low

-

High

63 I/O POWER DOWN

Normal

-

Dow n

32 I/O

40Hz START

ON

-

OFF

64 I/O

CVCC

-

-

-

12

Handset

Base
Unit

ACK-T

TALK

OFF HOOK
IN USE LED ON

ON HOOK
IN USE LED OFF

STANDBY

When the TALK button on Handset

is pressed during communication,

a LINK terminating DATA
(STANDBY)

is sent to terminate communication.

When calling, a communication

request DATA (ACK-T) is

transmitted from the Handset

first, and a permitting

data (ACK-OK) is returned from

the Base Unit to it.

The permitting DATA (ACK-OK)

from Base Unit to Handset

includes the empty channel

information stored in Base Unit.

After transmitting the

communication DATA (TALK)

from Handset to Base Unit,

the channel is used.

ACK-OK

(Free Channel Information)

[TALK]

              [TALK]

(STANDBY MODE)

(COMMUNICATION MODE)

(COMMUNICATION MODE)

(STANDBY MODE)

13

Handset

Base
Unit

(STANDBY MODE)

Ring signal

IN USE LED Flashing

Ring

Ring

After detecting the Ring signal from circuit, Base Unit sends a ring signal DATA (Ring), then the Handset starts ringing.

 Handset :

transmitting ... 28 Pin

receiving ... 16 Pin

 (IC901)
Base Unit :

transmitting ... 97 Pin

receiving ... 59 Pin

     (IC701)

The DATA which is transmitted from the Handset to the Base Unit is combination of DATA 0, DATA 1, DATA Delimit, Pre data

and End data.

The DATA which is transmitted from the Base Unit to the Handset is combination of DATA 0, DATA 1, DATA Delimit, Pre data

and End data.

Ring

Ringing
Flashing

14

2.560 ms

4.608 ms

6.144 ms

Pre data1

Pre data1

DATA 0

DATA 0

DATA 1

DATA 1

DATA Delimit

DATA Delimit

Pre data2

END data

END data

3.584 ms

4.608 ms

1.0 ms

8.192 ms

4.608

    ms

32.768 ms

43.520 ms

1 0 1

1 0 1 0 0 1 DATA

6.144

    ms

2.0 ms

3.0 ms

2.0 ms

3.0 ms

2.0 ms

5.0 ms

3.0 ms

When Linking from the Handset (when becoming STBY to TALK), DATA is transmitted in above format. The combined
portion of DATA 0 and DATA 1 is transmitted in LINK requesting DATA (40bit) format first. Then, when LINK OK (ACK-OK)
DATA
(46bit) is returned from the Base Unit, it is sent as LINK from DATA after changing the combination of DATA 0 and DATA 1. And
the DATA Delimit is between each Frame as a stop.
The contents of LINK requesting DATA and LINK form DATA are different depending on each operation.

  1  Frame

  Pre data 1   DATA 0 or DATA 1     D     DATA 0 or DATA 1

 D     DATA 0 or DATA 1  

•c •c •c

DATA Delimit

40 bit