ST75C540 datasheet(52/84 Pages) STMICROELECTRONICS

52 / 84 page

The STAOP2 Bits have the following meanings in Data Modem mode :

HSHK_PHA (R)

Handshake progression counter contains information abou t the progress of the

hadshake in V.32 and V.22bis modes. This 8-bit value is available in STAOP2 in modem

mode. It can be read to examine the progressio of the handshake and it contains normal

values and error values as below :

AUTOBAUD ORIG MODE

Event

HSHK_PHA Value

Wait Answer Tone

Wait End Answer Tone

Not Autobaud and Waiting

USC1

Autobaud Waiting AC or USC1

$01

$02

$03

$04

AUTOBAUD ANSW MODE

Event

HSHK_PHA Value

Waiting HSK Command

Generating Answer Tone

Generating Silence

$10

$11

$12

V.32 ORIG MODE

EVENT

HSHK_PHA Normal Value

HSHK_PHA Error Value

AC_DET

AC/CA DET

CA/AC DET

NO AC DET

S_DET

SB_DET

R1_DET

S_DET

SB_DET

R3_DET

E_DET

DATA_MODE

$20

$21

$22

$23

$24

$25

$26

$27

$28

$29

$2A

$30

$B for RTN, $C for RTN

$9, $D no R5 det after RRN

V.32 ANSW MODE

EVENT

HSHK_PHA Normal Value

HSHK_PHA Error Value

AA_DET

AA/CC DET

NO CC DET

S_DET

SB_DET2

SB_DET

R2_DET

E_DET

DATA_MODE

$40

$41

$42

$43

$44

$45

$46

$47

$50

$8 for RTN, $9 for RRN

$6, $A if no R det after RRN

V.22bis ORIG MODE

EVENT

HSHK_PHA Normal Value

HSHK

USC1_DET

SCR1_DET

S1_DET

DATA_MODE

$60

$61

$62

$63

$70

V.22bis ANSW MODE

EVENT

HSHK_PHA Normal Value

HSHK

SCR1_DET

S1_DET

DATA_MODE

$80

$82

$83

$90

VIII - STATUS DESCRIPTION (continued)

ST75C530 - ST75C540

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