Samsung S3C6400X User Manual page 770

S3C6400X RISC MICROPROCESSOR
Indirect Modem I/F
External
Modem
(3)
(2)
(1) AP write boot pgm to DPRAM (read from NAND)
(2) AP release BB reset
(3) BB read boot pgrm from Direct modem I/F
Note 1) Reset pin of the MODEM is controlled the GPIO pin of the AP. The pin must be in pull-down mode when
the initial power-on-reset state.
Note 2) the boot address Chip Select pin of the MODEM should be connected "XhiCSn".
Modem I/F
Direct Modem I/F
8KByte
DPRAM
GPIO
Figure 23-3 AP Booting for MODEM boot procedure
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
M
M
S
S
S
MODEM INTERFACE
WDT
ARM
SYSCON
NFCON
Stepping Stone
(1)
Boot Memory
23-5