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PRELIMINARY
HOST INTERFACE
S3C6400X
RISC MICROPROCESSOR
24-12
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.
Mailbox operation with a bulk data
When a 32-bit mailbox is not enough to transfer information, any memory of AP(S3C6400) can be used as buffer
memory.
For example, in order to transfer a bulk data from the host to AP(S3C6400), the host first writes the data into a
memory in AP(S3C6400) by using Burst Write of the CPUIF Client. After checking the completion of Burst Write
by reading the status register (ie, STAT[1] = 0), the host writes a message into the in-mailbox.
In order to transfer a bulk data from the AP(S3C6400) to the host, AP(S3C6400) first prepares the data in its
memory and writes a message into the out-mailbox by using SFR access. The write will generate an interrupt to
the host.
Table 24-1. Registers for Mailbox Interface
Group
Operation
Registers
Protocol register
Registers for mail-box
IMBL, IMBH, OMBL, OMBH
SFR Mailbox
CPUIFC_IMB,
CPUIFC_OMB