ZL50018 ZARLINK [Zarlink Semiconductor Inc], ZL50018 Datasheet - Page 84
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ZL50018
Manufacturer Part Number
ZL50018
Description
2 K Digital Switch with Enhanced Stratum 3 DPLL
Manufacturer
ZARLINK [Zarlink Semiconductor Inc]
Datasheet
1.ZL50018.pdf
(136 pages)
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Note 1:
Note 2:
Note 3:
15 - 0
External Read/Write Addresses: 0058
UL[n]
Bit
Reset Value: 2E4A
15
15
The default value represents limit for 8 kHz input frequency, which is +6.4µs (+10 U I
or programmed through the Reference Frequency Register), the following values are used instead:
’h2E4A (10UIp-p of 1.544 MHz i.e. 6.4 µs) - if reference frequency is 8 kHz
’h002B (0.3UIp-p) - if reference frequency is 1.544 MHz
’h0025 (0.2UIp-p) - if reference frequency is 2.048 MHz
’h0011 (0.2UIp-p) - if reference frequency is 4.096 MHz
’h0007 (0.2UIp-p) - if reference frequency is 8.192 MHz
’h0002 (0.2UIp-p) - if reference frequency is 16.384 MHz
’h0002 (0.2UIp-p) - if reference frequency is 19.44 MHz
The name ‘upper’ is based on frequency.
When the MRLE bit of DPLLCR register is low, these registers are ignored. Depending on reference frequency (detected
UL[n]
14
14
UL[n]15 -
(n = 0 - 3)
Name
0
UL[n]
13
13
H
(see Note 1)
UL[n]
Reference n Single Period Upper Limit Bits: The binary value of these bits defines the
upper limit for the period of the REFn input, minus 1. The unit of the binary value is
measured in 100 MHz clock periods.
12
12
Table 52 - Upper Limit Register (RnULR) Bits, (n = 0 - 3)
UL[n]
11
11
H
, 005C
UL[n]
10
10
H
, 0060
UL[n]
H
Zarlink Semiconductor Inc.
9
9
, 0064
ZL50018
UL[n]
H
8
8
84
UL[n]
7
7
Description
UL[n]
6
6
UL[n]
5
5
UL[n]
4
4
p-p
of 1.544 MHz).
UL[n]
3
3
UL[n]
2
2
Data Sheet
UL[n]
1
1
UL[n]
0
0
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