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Philips Semiconductors
handbook, full pagewidth
SDA
t BUF
SCL
P
S
t HD;STA
2
Fig 21. I
C-bus timing.
16. Test information
9397 750 07002
Product specification
t LOW
t r
t HD;STA
t HIGH
The dynamic characteristics of the analog I/O ports (D and D
and
Table
33, were determined using the circuit shown in
handbook, halfpage
D.U.T.
Load capacitance:
C
= 50 pF (full-speed mode)
L
C
= 200 pF or 600 pF (low-speed mode, minimum or maximum timing).
L
Speed selection:
full-speed mode (FS): 1.5 k pull-up resistor on D
low-speed mode (LS): 1.5 k pull-up resistor on D .
Fig 22. Load impedance for D+ and D- pins.
Rev. 03 — 29 March 2000
t f
t HD;STA
S
t SU;DAT
t SU;STA
test point
S1
20
C L
15 k
ISP1122
USB stand-alone hub
P
t SU;STO
MGR779
as listed in
Table 32
Figure
22.
V reg(3.3)
R PU
1.5 k
test
S1
D /LS
closed
D /LS
open
D /FS
open
D /FS
closed
MGR775
© Philips Electronics N.V. 2000. All rights reserved.
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