stlc3040 STMicroelectronics, stlc3040 Datasheet - Page 19

• Manufacturer Part Number: stlc3040
• Description: Subscriber Line Interface Codec Filter, Cofislic
• Manufacturer: STMicroelectronics

4.8 Configuration Registers
As already mentioned, Configuration Registers
are set and read by SOP command.
CR1 sets SLIC kit operating features and some
test features.
Reset value = 00 h.
PD sets the kit either in Stand By or External Indi-
cation/Loop open (for further details please see
table 13 pag. 45)
N/BB sets COFISLIC Battery Mode
LB enables Loop Back functions for on chip test
TON enables 1KHz test tone generator
HIA and HIB set tip and ring status in active and
standby mode
DHP enables High-Pass filter for test purpose
COR cuts off Receive Path for test purpose
CR2 enables or disables Test Mode, Teletax Sig-
nal Shaping Mode and sets the I/O pin direction.
The high nibble is only readable and defines test
mode results.
BIT7
BIT7
HIA
PD
= 0 SLIC kit (STLC3040/HV (L3000N, L3000S,
= 1 SLIC kit (STLC3040/HV (L3000N, L3000S,
= 0 High Pass filter On
= 1 High Pass filter Off
= 0 Receive Path transmission is enabled
= 1 Receive Path is disable
= 0 Normal Battery
= 1 Boosted Battery
= 0 normal function (no loop back)
= 1 Loop Back as defined in CR4 register
= 0 Test Tone Generator Off
= 1 Test Tone Generator On
0
0
1
1
STLC3170)) in External Indication Mode
STLC3170)) in Stand By
BIT6
N/BB
BIT6
HIB
0
1
0
1
BIT5 BIT4
negative
LB
normal
normal
BIT5
TIP
Hiz
Hiz
Standby
TON
BIT4
normal
normal
normal
RING
Hiz
BIT3 BIT2
HIA
BIT3 BIT2 BIT1 BIT0
Mode
negative
HIB
normal
normal
normal
TIP
Hiz
Active
BIT1
DHP COR
normal
normal
normal
RING
Hiz
BIT0
Reset value: 00h
XVA Internal measurement results shown in the
following three bits are or not valid (read only)
OKTON Test Tone meaurement information (read
only), see test mode 7
OKTTX Test teletax metering information (read
only), see Test Mode D and E
OKRNG Test Ring tone information (read only),
see Test Mode C
TMN Enables or disables COFISLIC testmodes
(see chapter 6)
NOSL Defines if the shaping of teletax signal is
switched On or Off
IO1 Selection for programmable I/O pin IO1
IO2 Selection for programmable I/O pin IO2
CR3 sets Persistence Check for upstream signal-
ling: Off-Hook and Ground-Key.
Reset value: A5 h
Persistence Reset value is 10 ms both for Off-
Hook and I1 input pin. 20ms for Ground-Key.
XVA OKTON OKTTX OKRNG TMN NOSL IO1 IO2
DUP3 DUP2 DUP1 DUP0 DUB3 DUB2 DUB1 DUB0
BIT7
= 0 Test tone level out of defined range
= 1 Test tone level in defined range
= 0 Test teletax metering different from the
= 1 Test teletax metering equal to the
= 0 Ring tone level out of defined range
= 1 Ring tone level within the defined range.
= 0 stops the assigned tests (normal mode)
= 1 starts the assigned tests selected by Regis-
= 0 Teletax shaping is on
= 1 Hard switch of Teletax signal
= 0 sets pin IO1 as input
= 1 sets pin IO1 as output
= 0 sets pin IO2 as input
= 1 sets pin IO2 as output
= 0 the following 3 ok-bits are not valid
= 1 the following 3 ok-bits are valid
ter CR5
defined value
defined value
BIT6
BIT5
BIT4 BIT3
BIT2 BIT1
STLC3040
BIT0
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