RS8953 Conexant Systems, Inc., RS8953 Datasheet - Page 128

• Manufacturer Part Number: RS8953
• Description: High-bit-rate Digital Subscriber Line (hdsl) Channel unit
• Manufacturer: Conexant Systems, Inc.

4.0 Registers
4.14 Common Status
4.14 Common Status
Table 4-11. Common Status Read Registers
The receive BER meter and the transmit PRBS generator work in conjunction to perform characterization,
installation, maintenance, and diagnostic testing on PCM and HDSL channels. PRBS_MODE and PRBS_DIS
[CMD_3; addr 0xE7] determine which of the four PRBS patterns or constant pattern is checked by the BER
meter.
BER[7:0]
4-60
0x1D—Bit Error Rate Meter (BER_METER)
Address
0x1D
0x1E
0x20
0x28
0x30
0x38
0x39
0x3A
0x3B
0x3C
0x1F
7
MSYNC_PHS_LO
MSYNC_PHS_HI
RESID_OUT_LO
Register Label
RESID_OUT_HI
SHADOW_WR
BER_STATUS
ERR_STATUS
BER_METER
Bit Error Ratio—Contains the total number of logical bit errors counted in real time during the
test measurement interval defined by BER_SCALE [CMD_3; addr 0xE7]. BER stops
counting when the test measurement interval is completed or the counter reaches its maximum
value of 255, after which the BER_METER result is latched until the meter is reset
[BER_RST; addr 0xEF].
NOTE:
PHS_ERR
IMR
IRR
6
BER does not suspend error counting when the HDSL receive framer loses frame
alignment. Any time after test completion [see BER_DONE in BER_STATUS; addr
0x1E], the MPU can calculate an exact Bit Error Ratio, as follows:
Bits
5
8
3
8
8
8
8
8
8
5
8
7
BER_SCALE
4
Conexant
BER[7:0]
00
01
10
11
3
Interrupt Request Register
Interrupt Mask Register
Multiframe Sync Phase
Multiframe Sync Phase
Bit Error Rate Meter
Name/Description
DPLL Phase Error
BER Meter Status
DPLL Residual
DPLL Residual
Shadow Write
Error Status
2
BER[7:0] 2
BER[7:0] 2
BER[7:0] 2
BER[7:0] 2
Bit Error Ratio
RS8953B/8953SPB
1
HDSL Channel Unit
31
28
25
21
N8953BDSB
0