bt8970 Mindspeed Technologies, bt8970 Datasheet - Page 46

• Manufacturer Part Number: bt8970
• Description: Single-chip Hdsl Transceiver
• Manufacturer: Mindspeed Technologies

4.0 Register
smon[5:0]
0x02—Interrupt Mask Register Low (mask_low_reg)
Independent read/write mask bits for each of the Timer Source Register [timer_source; 0x04] interrupt flags. A
logic one represents the masked condition. A logic zero represents the unmasked condition. All mask bits
behave identically with respect to their corresponding interrupt flags. Setting a mask bit prevents the
corresponding interrupt flag from affecting the IRQ output. Clearing a mask allows the interrupt flag to affect
IRQ output. Unmasking an active interrupt flag will immediately cause the IRQ output to go active, if currently
inactive. Masking an active interrupt flag will cause IRQ to go inactive, if no other unmasked interrupt flags are
set.
t4
t3
snr
meter
sut4
sut3
sut2
sut1
4-2
Decimal
0 – 47
48
49
50
51
52
53
t4
7
smon[5:0]
Serial Monitor Source Select—Read/write binary field selects the Serial Monitor (SMON)
output source.
General Purpose Timer 4
General Purpose Timer 3
SNR Alarm Timer
Meter Timer
Startup Timer 4
Startup Timer 3
Startup Timer 2
Startup Timer 1
00 0000 – 10 1111
t3
6
11 0000
11 0001
11 0010
11 0011
11 0100
11 0101
Binary
Preliminary Information/Conexant Proprietary and Confidential
snr
5
Equalizer Register File
Digital Front-End Output/LEC Input
Linear Echo Replica
DFE Subtractor Output/EP Input
EP Subtractor Output/Slicer Input
Timing Recovery Phase Detector Output/Loop Filter Input
Timing Recovery Loop Filter Output/Frequency Synthesizer Input
meter
4
Conexant
su4
3
Source
sut3
2
Single-Chip HDSL Transceiver
sut2
1
100101B
sut1
Bt8970
0