User's Manual

9/29/2004 OV4F2
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User Manual BCM2035
04/23/03
Broadcom Corporation
Document 2035-UM100-R Load Mini-Drivers From UART Page 47
Figure 27: NAK to Boot ROM Read for Baud Rate Negotiation and Mini-Driver Download
Table 9: Power-On Clock Stable to Mode-0 Boot ROM Ready for Baud Rate Negotiation and Mini-
Driver Download Description Table
Description Time Min Typical Max
Clock stable to autobaud-signal max TASmax - 100 us -
Autobaud-signal to autobaud-character min TASTAmin - 50 us -
Autobaud-signal to autobaud-character max Ttac - infinity -
Autobaud character to RTS Trtsa - 100 us -
RTS to autobaud-character response over
UART
TARu - 150 us -
Table 10: NAK to Boot ROM Read for Baud Rate Negotiation and Mini-Driver Download Description
Table
Description Time Min Typical Max
NAK to ROM ready for download Tntrr - 1.04 s -
CTS
RTS
TX
Stop bit for
NAK*
NAK* to ROM ready for download
*NAK character is 0x78 ('x')
Tntrr
!RTS