PEB2256HT datasheet(168/490 Pages) INFINEON

168 / 490 page

FALC56 V1.2

PEB 2256

Functional Description T1/J1

Data Sheet

168

2002-08-27

5.5.1.1

Receive Offset Programming

Depending on the selection of the synchronization signals (SYPR or RFM), different

calculation formulas are used to define the position of the synchronization pulses. These

formulas are given below, see Figure 56 to Figure 59 for explanation. The pulse length

of SYPR and RFM is always the basic T1/J1 bit width (648 ns) in 1.544-MHz mode or

the E1 bit width (488 ns) in 2.048-MHz mode.

This chapter describes the system highway operation in 1.544-MHz mode only. If the

system highway is operated in 2.048-MHz mode, the description given in

Chapter 4.5.1.1 on page 106 applies.

SYPR Offset Calculation

Time between beginning of SYPR pulse and beginning of next frame

(time slot 0, bit 0), measured in number of SCLKR clock intervals

maximum delay: T

max =(193 × SC/SD)-1

SD:

Basic data rate; 1.544 Mbit/s

SC:

System clock rate; 1.544, 3.088, 6.176, or 12.352 MHz

Programming value to be written to registers RC0 and RC1 (see page 359).

≤ T ≤ 4:

X = 4 - T + (7

× SC/SD)

≤ T ≤ T

max: X = (200 × SC/SD) + 4 - T

RFM Offset Calculation

MP:

Marker position of RFM, counting in SCLKR clock cycles (0 = F-bit)

SC = 1.544 MHz:

≤ MP ≤ 192

SC = 3.088 MHz:

≤ MP ≤ 385

SC = 6.176 MHz:

≤ MP ≤ 771

SC = 12.352 MHz:

≤ MP ≤ 1543

SD:

Basic data rate; 1.544 Mbit/s

SC:

System clock rate; 1.544, 3.088, 6.176, or 12.352 MHz

Programming value to be written to registers RC0 and RC1 (see page 359).

≤ MP ≤ 193 × (SC/SD) - 3: X = MP + 2 + (7 × SC/SD)

193

× (SC/SD)-2 ≤ MP ≤ 193 × (SC/SD) - 1: X = MP + 2 - (186 × SC/SD)

PEB2256HT Datasheet(PDF) 168 Page - Infineon Technologies AG

PEB2256HT Datasheet(HTML) 168 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL