tza3017hw NXP Semiconductors, tza3017hw Datasheet - Page 10

• Manufacturer Part Number: tza3017hw
• Description: 30 Mbits/s Up To 3.2 Gbits/s A-rate Fibre Optic Transmitter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2003 May 14
handbook, full pagewidth
30 Mbits/s up to 3.2 Gbits/s
A-rate fibre optic transmitter
CALCULATE
N and K
NILFRAC = 1
Fig.5 Flowchart for calculating N and K for the required bit rate.
N = 2
n
yes
n, k =
k is fractional part
Write K j into registers B3H, B4H and B5H
n is integer part
0.25
NILFRAC = 0
and write into registers B1H and B2H
bit rate
N = 2
k = k
k = k
j = j
K j = 1
K j = 1
k = 0 ?
j = 21
k
j = 0 ?
END
k
1 ?
no
f ref
yes
yes
yes
Convert N to binary
1
n
2
0.75
1
M
R
no
no
no
10
N = 2
k = k
k
0.25 ?
K j = 0
yes
n
0.5
1
MGW570
no
N = 2
k = k
k
0.75 ?
yes
n
0.5
1
decimal to binary
conversion of
fractional part
no
TZA3017HW
Product specification