參數(shù)資料
型號: OL2300NHN
廠商: NXP SEMICONDUCTORS
元件分類: 通信及網(wǎng)絡
英文描述: Fractional-N PLL based transmitter
中文描述: SPECIALTY TELECOM CIRCUIT, PQCC16
封裝: 3 X 3 MM, 0.85 MM HEIGHT, LEAD FREE, PLASTIC, MO-220, SOT758-1, VQFN-16
文件頁數(shù): 22/46頁
文件大?。?/td> 951K
代理商: OL2300NHN
OL2300
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 2 — 28 October 2010
22 of 46
NXP Semiconductors
OL2300
Fractional-N PLL based transmitter
[1]
If the bit PDCK in register TXCON is set, CKOUT is set 3-state (independent from the CSS[2:0] settings).
6.7.3
Prescaler
The Prescaler clock is the reference clock divided by 1, 2, 4, 8 to 128. The division ratio is
set in the PSC[2:0] bits (See
Table 32
).
Table 32.
PSC2
0
0
0
0
1
1
1
1
[1]
Reset/Power-on state: if SDIO is low at the rising edge of EN a division ratio of 16 will be applied, otherwise
the division ratio will remain unchanged.
6.7.4
After-scaler
The after-scaler clock is the baud rate clock divided by 1, 2, 4 and 8. The division ratio is
set in the ASC[2:0] bits (see
Table 33
).
Table 33.
ASC1
0
0
1
1
[1]
The after-scaler is only active in the transmit mode when the power amplifier is switched on.
6.7.5
TXDATA output
The TXDATA output is synchronized with the reference clock even in transparent
transmission mode where the data is selected from SDIO and fed directly to the power
amplifier control stage (see
Figure 10
).
1
1
1
0
1
1
1
0
1
prescaler clock
[1]
LOW if TX disabled; baud rate clock if TX enabled
HIGH if TX disabled; inverted baud rate clock if TX enabled
Table 31.
CSS2
Clock Source Selection (CSS)
…continued
CSS1
CSS0
CKOUT
Prescaler Control (PSC)
PSC1
PSC0
0
0
0
1
1
0
1
1
0
0
0
1
1
0
1
1
Division ratio
1
2
4
8
16
[1]
32
64
128
After-Scaler Control (ASC)
[1]
ASC0
Division ratio
0
1
1
2
0
4
1
8
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