DS80C400_09 Datasheet, PDF (70/97 Pages) Maxim Integrated Products – Network Microcontroller

Figure 12. ROM Code Boot Sequence
ANY RESET SOURCE
ACTIVE EXCEPT
RST PIN
RST PIN = 1
DS80C400 Network Microcontroller
RESET SOURCE
Y
ACTIVE?
N
0
EA PIN?
1
1
BROM BIT?
0
0
Y
RST PIN = 1?
N
0
EA PIN?
1
1
BROM BIT?
0
SERIAL
LOADER (P1.7)
PIN?
0
1
AUTO-BAUD
Y
SUCCESS?
N
SERIAL LOADER
N
E
PC = 000000h
NETBOOT
0
(P5.3) PIN?
1
SEARCH FOR USER CODE
USER CODE
NO
FOUND?
YES
PC = LOCATION OF FIRST
TINI TAG FOUND
RUN USER CODE
NETBOOT
NETBOOT
0
(P5.3) PIN?
1
ENTER STOP MODE AND
HALT OPERATION
GENERATE
WATCHDOG RESET
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