2001 Nov 23

10

Philips Semiconductors

Product specification

HITAG reader chip

HTRC11001T

8.8.7

This command is used to set the filter and amplifier parameters (cut-off frequencies and gain factors) and to select the

operation mode. Bits P1 and P0 select one of four configuration pages.

Table 2

Configuration page bit names

Table 3

Description of the configuration page bits

NAME

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

Command

0

1

P1

P0

D3

D2

D1

D0

COMMAND

PAGE NUMBER

BIT

7

6

P1

P0

D3

D2

D1

D0

SET_CONFIG_PAGE 0

0

1

0

0

GAIN1

GAIN0

FILTERH

FILTERL

SET_CONFIG_PAGE 1

0

1

0

1

PD_MODE

PD

HYSTERESIS

TXDIS

SET_CONFIG_PAGE 2

0

1

1

0

THRESET

ACQAMP

FREEZE1

FREEZE0

SET_CONFIG_PAGE 3

0

1

1

1

DISLP1

DISSMART-

COMP

FSEL1

FSEL0

BIT NAME

VALUE

DESCRIPTION

INITIAL

VALUE

FILTERL

main low-pass cut-off frequency

0

FILTERH

main high-pass cut-off frequency

0

GAIN0

amplifier 0 gain factor

0

gain = 16

0

1

gain = 32

GAIN1

amplifier 1 gain factor

0

gain = 6.22

1

gain = 31.5

1

TXDIS

disable coil driver

0

coil driver active

0

1

coil driver inactive

HYSTERESIS

data comparator hysteresis

0

hysteresis OFF

0

1

hysteresis ON

PD

Power-down mode enable

0

device active

0

1

device power-down