CLRC663 datasheet(73/177 Pages) NXP

73 / 177 page

NXP Semiconductors

CLRC663

High performance multi-protocol NFC frontend CLRC663 and CLRC663 plus

9.7.2 T0Control

Control register of the Timer0.

Bit

Symbol

T0StopRx

T0Start

T0AutoRestart

T0Clk

Access

rights

r/w

RFU

r/w

RFU

r/w

Table 81. T0Control register (address 0Fh);

Bit

Symbol

Description

T0StopRx

If set, the timer stops immediately after receiving the first 4 bits. If cleared the timer does

not stop automatically.

Note: If LFO Trimming is selected by T0Start, this bit has no effect.

RFU

5 to 4

T0Start

00b: The timer is not started automatically

01 b: The timer starts automatically at the end of the transmission

10 b: Timer is used for LFO trimming without underflow (Start/Stop on PosEdge)

11 b: Timer is used for LFO trimming with underflow (Start/Stop on PosEdge)

T0AutoRestart

1: the timer automatically restarts its count-down from T0ReloadValue, after the counter

value has reached the value zero.

0: the timer decrements to zero and stops.

The bit Timer1IRQ is set to logic 1 when the timer underflows.

RFU

1 to 0

T0Clk

00 b: The timer input clock is 13.56 MHz.

01 b: The timer input clock is 211,875 kHz.

10 b: The timer input clock is an underflow of Timer2.

11 b: The timer input clock is an underflow of Timer1.

Table 82. T0Control bits

9.7.2.1 T0ReloadHi

High byte reload value of the Timer0.

Bit

Symbol

T0Reload Hi

Access

rights

r/w

Table 83. T0ReloadHi register (address 10h);

Bit

Symbol

Description

7 to 0

T0ReloadHi

Defines the high byte of the reload value of the timer. With the start event, the timer

loads the value of the registers T0ReloadValHi, T0ReloadValLo. Changing this register

affects the timer only at the next start event.

Table 84. T0ReloadHi bits

CLRC663

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 5.3 — 3 January 2024

73 / 177

CLRC663 Datasheet(PDF) 73 Page - NXP Semiconductors

CLRC663 Datasheet(HTML) 73 Page - NXP Semiconductors

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