Table 4 : Control Register 0 : AFE Setting

Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

Function

0

0

0

0

Main Receive input (INI)

0

0

0

1

Auxil. Receive input

0

0

0

0

0dB Receive Gain (INI)

0

0

0

1

+6dB Receive Gain

0

0

0

0

0

0

OVER = 320 (INI)

0

0

0

0

0

1

OVER = 384

0

0

0

1

0

1

OVER = 128

0

0

0

1

1

0

OVER = 192

0

0

0

1

1

1

OVER = 256

0

0

0

0

0

- Infin. attenuation XMIT (INI)

0

0

0

0

1

+2dB gain XMIT

0

0

0

1

0

6dB attenuation XMIT

0

0

0

1

1

0dB gain XMIT

000

0

M = 1

0

0

0

1

M = 2 (INI)

00000

0

Q = 3

00000

1

Q = 6 (INI)

00001

0

Q = 7

00001

1

Q = 8

00010

0

Q = 4.5

00010

1

Q = 5.5

00011

0

Q = 6.5

00011

1

Q = 7.5

Table 5 : Control Register 1 : GPIO Setting, Ring Bit

Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

Function

0

0

1

Di3 Di2 Di1 Di0

DIR. ’0’ = (Inp INI), 1 = Out

0

0

1

MR

M3 M2 M1 M0

MASK for INT. GPI ’0’ masked

(INI), ’1’ unmasked

DR

Digital Ring ’1’ on, ’0’ off (INI)

Table 6 : Control Register 2 : GPIO / RING Output Setting

Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0

Function

0

1

0

G3

G2

G1

G0

GPIOx output setting, read

input

0

1

0

RG

Read only, Ring

0

1

0

S

GPIO3 ’0’ In static Value (INI)

if set GPIO3 modulated at F0

0

1

0

x

x

0

GPIO0 In static Value (INI)

0

1

0

0

0

1

GPIO0 Modulate at F0

0

1

0

0

1

1

GPIO0 Modul. at F0/2

0

1

0

1

0

1

GPIO0 Modul. at F0/4

0

1

0

1

1

1

GPIO0 Modul. at F0/8

Note :

GPI is in "high" state, any change on one Gx or RG non-masked put GPI in "low" state, one read on this register (@010) put GPI in

"hight" state.

FUNCTIONAL DESCRIPTION (continued)

ST75951

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