CLRC663 datasheet(97/132 Pages) NXP

Part #	CLRC663

Description	Contactless reader IC

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Manufacturer	NXP [NXP Semiconductors]

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CLRC663

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Product data sheet

COMPANY PUBLIC

Rev. 3.3 — 3 April 2012

171133

97 of 132

NXP Semiconductors

CLRC663

Contactless reader IC

9.13.2 LPO_Trimm

Table 166. SerialSpeed register (address3Bh); reset value: 7Ah

Bit

7

6

5

4

3

2

1

0

Symbol

BR_T0

BR_T1

Access

rights

r/w

Table 167. SerialSpeed bits

Bit

Symbol Description

7 to 5 BR_T0

BR_T0 = 0: transfer speed = 27.12 MHz / (BR_T1 + 1)

BR_T0 > 0: transfer speed = 27.12 MHz / (BR_T1 + 33) / 2^(BR_T0

 1)

4 to 0 BR_T1

BR_T0 = 0: transfer speed = 27.12 MHz / (BR_T1 + 1)

BR_T0 > 0: transfer speed = 27.12 MHz / (BR_T1 + 33) / 2^(BR_T0

 1)

Table 168. RS232 speed settings

Transfer speed (kbit/s)

SerialSpeed register content (Hex.)

7,2

FA

9,6

EB

14,4

DA

19,2

CB

38,4

AB

57,6

9A

115,2

7A

128,0

74

230,4

5A

460,8

3A

921,6

1C

1228,8

15

Table 169. LPO_Trim register (address 3Ch)

Bit

7

6

5

4

3

2

1

0

Symbol

lpo_trimm

Access

rights

r/w

Table 170. LPO_Trim bits

Bit

Symbol

Description

7 to 0

lpo_trimm

Trimm value. Refer to Section 8.8.3 “Low-Power Oscillator (LPO)”

Note: If the trimm value is increased, the frequency of the oscillator

decreases

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