T9000
Preliminary Data Sheet
November 2000
ISDN Network Termination Node (NTN) Device
8 Device Operation Control
8.1 Device Operation Register
Table 41. DOCR: Device Operation Control Register (0x50)
Reg
R/W
Bit 7
Bit 6
BS_E
0
Bit 5
—
Bit 4
—
Bit 3
NT_LT
0
Bit 2
—
Bit 1
—
Bit 0
—
DOCR
R/W
FORCE_SAI_STD
RESET Default
0
0
0
0
0
0
Bit #
Symbol
Name/Description
7
FORCE_SAI_STD FORCE SAI Bit to Follow ETSI Standard. Controls the value of the upstream SAI
bit, as may be required when conformance testing with a Siemens* K1404 U-inter-
face tester.
0: When this bit is set to 0, the SAI bit upstream remains high during the period
from RXINFO1 going low to RXINFO3 going high, so the Siemens K1404 will
not initiate U-only activation when TE-initiated activation is being tested.
1: When this bit is set to 1, the SAI bit remains low conforming to the ETSI ETR
080 standard.
6
Backswing Suppression Enable. This bit enables the backswing suppression
feature on the S/T-interface. It is recommended that this bit be programmed to 0.
BS_E
0: Backswing suppression enabled.
1: Backswing suppression not used.
5—4
3
—
Reserved. Program to 0.
NT_LT
NT or LT Operation of the NTN Device. This bit selects the NT or LT operation of
the device. This bit defaults to 0, selecting NT mode. When programmed to 1, the
NTN device is in LT mode. When set to LT mode, GPIO2.6 is the input (regardless
of the GPDIR2 value) for the 8 kHz MTC signal.
2—0
—
Reserved. Program to 0.
* Siemens is a trademark of Siemens Aktiengesellschaft.
Table 42. B1UP: B1-Channel Upstream Data from GCI to U-Interface (0x51)
Reg
R/W
Bit 7
B1UP7
—
Bit 6
B1UP6
—
Bit 5
B1UP5
—
Bit 4
B1UP4
—
Bit 3
B1UP3
—
Bit 2
B1UP2
—
Bit 1
B1UP1
—
Bit 0
B1UP0
—
B1UP
R/W
RESET Default
Bit #
Symbol
Name/Description
7—0
B1UP[7:0]
B1-Channel Upstream Data. When DFR[U_FORCE_B1UP] = 1, DFR[B1_SEL] = 1, and
ECR0[LB1] = 0, the microcontroller can write into this register the content that the user
wants to be transferred on the upstream B1 channel from GCI to the U-interface.
Lucent Technologies Inc.
47
AGERE [ AGERE SYSTEMS ]
