Philips Universal Serial Bus ISP1122 - Manual (Page 45)

Philips Semiconductors
ISP1122
USB stand-alone hub
Product specification Rev. 03 — 29 March 2000 45 of 48
9397 750 07002 © Philips Electronics N.V. 2000. All rights reserved.
19. Revision history
Table 36: Revision history
Rev Date CPCN Description
03 20000329 Product specification, third version; supersedes ISP1122-02 of 4 October 1999
(9397 750 06389). Modifications:
• Table 1 “Ordering information” : table note on LQFP32 availability removed
• Table 23 “Configuration bits” : values of bits C7 and C6 exchanged
• Section 12.4 “Reference circuits” : resistor value for soft turn-on RC-circuit changed from
10 k
Ω
to 47 k
Ω
; see also Figure 10 to 13 .
02 19991004 Product specification, second version; supersedes initial version ISP1122-01 of
3 June 1999 (9397 750 05154). Modifications:
• Terminology made consistent: ganged power switching, global overcurrent detection
• Added note on availability of LQFP32 to Table 1 “Ordering information”
• Updated reference circuits in Section 12.4 “Reference circuits” : pull-up resistors changed
to 330 k
Ω
, soft turn-on RC network: capacitor moved and changed to 0.1
µ
F
• Updated Figure 22 “Load impedance for D+ and D- pins.” : V
CC
-> V
reg(3.3)
.
01 19990603 Product specification; initial version.