RS8953SPBEPF View Datasheet(PDF) - Conexant Systems
Part Name
Description
MFG CO.
'RS8953SPBEPF' PDF : 173 Pages View PDF
4.0 Registers
4.14 Common Status
RS8953B/8953SPB
HDSL Channel Unit
4.14 Common Status
Table 4-11. Common Status Read Registers
Address Register Label Bits
0x1D
BER_METER
8
0x1E
BER_STATUS
3
0x1F
IRR
8
0x20
RESID_OUT_HI
8
0x28
RESID_OUT_LO
8
0x30
IMR
8
0x38
PHS_ERR
8
0x39
MSYNC_PHS_LO
8
0x3A
MSYNC_PHS_HI
5
0x3B
SHADOW_WR
8
0x3C
ERR_STATUS
7
Name/Description
Bit Error Rate Meter
BER Meter Status
Interrupt Request Register
DPLL Residual
DPLL Residual
Interrupt Mask Register
DPLL Phase Error
Multiframe Sync Phase
Multiframe Sync Phase
Shadow Write
Error Status
0x1D—Bit Error Rate Meter (BER_METER)
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.
7
BER[7:0]
6
5
4
3
2
1
0
BER[7:0]
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: 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:
BER_SCALE
00
01
10
11
Bit Error Ratio
BER[7:0] ÷ 231
BER[7:0] ÷ 228
BER[7:0] ÷ 225
BER[7:0] ÷ 221
4-60
Conexant
N8953BDSB
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