AMD SC1200, SC1201 manual Fast IR Port Timing 33. Fast IR Port Timing Parameters, Mir, Fir

32579B Electrical Specifications

9.3.12Fast IR Port Timing

Table 9-33. Fast IR Port Timing Parameters

Symbol	Parameter	Min	Max	Unit	Comments
tMPW	MIR signal pulse width	tMWN-25	tMWN+25	ns	Transmitter
		(Note 1)
		60		ns	Receiver
MDRT	MIR transmitter data rate		± 0.1%
	tolerance
tMJT	MIR receiver edge jitter, % of		± 2.9%
	nominal bit duration
tFPW	FIR signal pulse width	120	130	ns	Transmitter
		90	160	ns	Receiver
tFDPW	FIR signal double pulse width	245	255	ns	Transmitter
		215	285	ns	Receiver
FDRT	FIR transmitter data rate		± 0.01%
	tolerance
tFJT	FIR receiver edge jitter, % of		± 4.0%
	nominal bit duration

Note 1. tMWN 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.

tMPW

MIR

Data

tFPW Symbol tFDPW

FIR

Chips

Figure 9-43. Fast IR Timing (MIR and FIR) Diagram

422 AMD Geode™ SC1200/SC1201 Processor Data Book