SLRC400 Datasheet, PDF (36/130 Pages) NXP Semiconductors – I·CODE Reader IC

Philips Semiconductors
I•CODE Reader IC
Product Specification Rev. 2.0 November 2001
SL RC400
5.2.3.6 ModWidth Register
selects the width of the modulation pulse.
Name: ModWidth
Address: 0x15
Reset value: 00111111, 0x3F
7
6
5
4
3
2
1
0
ModWidth
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Rights
Description of the bits
Bit
Symbol
7-0
ModWidth
Function
This register defines the width of the modulation pulse according to
T_mod = 2⋅(ModWidth +1) / fc (fc = Oscillator clock 13.56 MHz).
Preset for I•CODE1 (Fast and Standard Mode) and ISO 15693 is 0x3F
(Modulation width: 9.44µs).
5.2.3.7 ModWidthSOF Register
Name: ModWidthSOF
Address: 0x16
Reset value: 00111111, 0x3F
7
6
5
4
3
2
1
0
ModWidthSOF
Access
r/w
r/w
r/w
r/w
r/w
r/w
r/w
r/w
Rights
Description of the bits
Bit
Symbol
Function
7-0 ModWidthSOF This register defines the width of the modulation pulse for SOF
T_mod = 2⋅(ModWidth +1) / fc .
Register setting:
I•CODE1 Standard Mode: 0x3F (Modulation width SOF: 9.44µs).
I•CODE1 Fast Mode: 0x73 (Modulation width SOF: 18.88µs).
ISO 15693: 0x3F (Modulation width SOF: 9.44µs).
36
Preliminary