Electrical Specifications

32581C

9.3.11Fast IR Port

Table 9-30. 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 toler-

 

± 0.1%

 

 

 

ance

 

 

 

 

 

 

 

 

 

 

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 toler-

 

± 0.01%

 

 

 

ance

 

 

 

 

 

 

 

 

 

 

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 9-42. Fast IR (MIR and FIR) Timing Diagram

AMD Geode™ SC3200 Processor Data Book

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Page 405
Image 405
AMD SC3200 manual Fast IR Port 30. Fast IR Port Timing Parameters, Mir, Fir