SC2200 Datasheet, PDF (413/433 Pages) National Semiconductor (TI) – Thin Client On a Chip

Electrical Specifications (Continued)
8.3.11 Fast IR Port
Table 8-30. Fast IR Port Timing Parameters
Symbol Parameter
Min
Max
Unit Comments
t_MPW
MIR Signal Pulse Width
t_MWN-25^{1 t}MWN⁺²⁵
ns
Transmitter
60
ns
Receiver
M_DRT
MIR Transmitter Data Rate Tolerance
± 0.1%
t_MJT
MIR Receiver Edge Jitter, % of Nominal Bit
Duration
± 2.9%
t_FPW
FIR Signal Pulse Width
120
130
90
160
ns
Transmitter
ns
Receiver
t_FDPW
FIR Signal Double Pulse Width
245
255
215
285
ns
Transmitter
ns
Receiver
F_DRT
FIR Transmitter Data Rate Tolerance
± 0.01%
t_FJT
FIR Receiver Edge Jitter, % of Nominal Bit
Duration
± 4.0%
1. t_MWN is the nominal pulse width for MIR mode. It is determined by the M_PWID field (bits [4:0]) in the MIR_PW register
at offset 01h in bank 6 of logical device 5.
t_MPW
MIR
Data
t_FPW ^Symbol
t_FDPW
FIR
Chips
Figure 8-42. Fast IR (MIR and FIR) Timing Diagram
Revision 3.0
413
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